*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a8cff;
  --primary-dark:#0d6fd4;
  --accent:#ff6b35;
  --text:#1a1a2e;
  --text-light:#5a5a72;
  --bg:#f5f8fc;
  --white:#fff;
  --border:#e2e8f0;
  --shadow:0 4px 24px rgba(26,140,255,.1);
  --radius:12px;
  --max:1200px;
  --header-h:70px;
}
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:1.75}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block;border-radius:8px}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--white);box-shadow:0 2px 12px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--max);margin:0 auto}
.logo{display:flex;align-items:center;gap:12px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:42px;height:42px;border-radius:10px}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:.3s}
.main-nav ul{display:flex;gap:8px;list-style:none}
.main-nav a{display:block;padding:8px 16px;border-radius:8px;color:var(--text);font-weight:500;font-size:.95rem}
.main-nav a:hover,.main-nav a.active{background:rgba(26,140,255,.1);color:var(--primary)}

/* Ads bar */
.ads-bar-wrap{position:sticky;top:var(--header-h);z-index:90;background:var(--white);border-bottom:1px solid var(--border);box-shadow:0 2px 10px rgba(0,0,0,.06);padding:6px 0}
#ads{display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;background:transparent;margin:0 auto;max-width:var(--max);padding:0 12px;gap:6px}
#ads>div{display:flex;flex-direction:column;align-items:center;width:70px;box-sizing:border-box}
#ads img{width:65px;height:65px;object-fit:cover;border-radius:18px;box-shadow:0 6px 18px rgba(24,24,24,.12);transition:transform 180ms ease,box-shadow 180ms ease;display:block;border:none;background:linear-gradient(135deg,#fff,#fff)}
#ads a{display:inline-block;text-decoration:none;border-radius:15px}
#ads img:hover{transform:translateY(-4px) scale(1.04);box-shadow:0 10px 24px rgba(24,24,24,.18)}
#ads figcaption,#ads .caption{height:15px;font-size:11px;color:#666;text-align:center;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}

/* Hero */
.hero{background:linear-gradient(135deg,#1a8cff 0%,#4db8ff 50%,#7dd3fc 100%);color:var(--white);padding:60px 20px 80px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-50%;right:-20%;width:500px;height:500px;background:rgba(255,255,255,.08);border-radius:50%}
.hero h1{font-size:2.2rem;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-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:50px;font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--white);color:var(--primary);box-shadow:0 4px 16px rgba(0,0,0,.15)}
.btn-outline{background:transparent;color:var(--white);border:2px solid rgba(255,255,255,.7)}
.btn-accent{background:var(--accent);color:var(--white)}

/* Sections */
section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.8rem;margin-bottom:10px;color:var(--text)}
.section-title p{color:var(--text-light);max-width:600px;margin:0 auto}

/* Feature cards */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card .icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),#4db8ff);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.feature-card h3{font-size:1.15rem;margin-bottom:8px}
.feature-card p{color:var(--text-light);font-size:.95rem}

/* Content blocks */
.content-block{background:var(--white);border-radius:var(--radius);padding:36px;margin-bottom:32px;box-shadow:var(--shadow)}
.content-block h2{font-size:1.5rem;margin-bottom:16px;color:var(--primary);padding-bottom:10px;border-bottom:2px solid var(--border)}
.content-block h3{font-size:1.2rem;margin:24px 0 12px;color:var(--text)}
.content-block p,.content-block li{color:var(--text-light);margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:16px}
.content-block li{margin-bottom:8px}

/* Image showcase */
.showcase{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;margin:32px 0}
.showcase.reverse{direction:rtl}
.showcase.reverse>*{direction:ltr}
.showcase-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.showcase-img img{width:100%;border-radius:var(--radius)}
.showcase-text h3{font-size:1.3rem;margin-bottom:12px}
.showcase-text p{color:var(--text-light);margin-bottom:12px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin:32px 0}
.step{background:var(--white);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow);position:relative}
.step-num{width:40px;height:40px;background:var(--primary);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 14px;font-size:1.1rem}
.step h4{margin-bottom:8px;font-size:1.05rem}
.step p{color:var(--text-light);font-size:.9rem}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin:32px 0}
.gallery-item{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s}
.gallery-item:hover{transform:scale(1.02)}
.gallery-item img{width:100%;aspect-ratio:9/16;object-fit:cover}
.gallery-item figcaption{padding:14px;font-size:.9rem;color:var(--text-light)}

/* FAQ */
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{padding:18px 24px;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 24px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--text-light)}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:300px}

/* Page header */
.page-header{background:linear-gradient(135deg,var(--primary),#4db8ff);color:var(--white);padding:48px 20px;text-align:center}
.page-header h1{font-size:2rem;margin-bottom:8px}
.page-header p{opacity:.9}

/* Legal pages */
.legal-content{max-width:860px;margin:40px auto;padding:0 20px}
.legal-content h2{font-size:1.3rem;margin:28px 0 12px;color:var(--primary)}
.legal-content p,.legal-content li{color:var(--text-light);margin-bottom:10px;line-height:1.8}
.legal-content ul{padding-left:24px;margin-bottom:16px}

/* Error pages */
.error-page{min-height:80vh;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-light);margin-bottom:24px}

/* Footer */
.site-footer{background:#0f172a;color:#94a3b8;padding:48px 20px 24px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;max-width:var(--max);margin:0 auto 32px}
.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:#94a3b8;font-size:.9rem}
.footer-grid a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid #1e293b;font-size:.85rem;max-width:var(--max);margin:0 auto}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.9rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}

/* Internal links box */
.internal-links{background:rgba(26,140,255,.06);border:1px solid rgba(26,140,255,.15);border-radius:var(--radius);padding:20px 24px;margin:24px 0}
.internal-links h4{margin-bottom:10px;color:var(--primary)}
.internal-links a{margin-right:16px;font-size:.9rem}

/* Responsive */
@media(max-width:768px){
  :root{--header-h:64px}
  .nav-toggle{display:block}
  .main-nav{position:absolute;top:100%;left:0;right:0;background:var(--white);box-shadow:0 8px 24px rgba(0,0,0,.1);display:none;padding:12px 0}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;padding:0 16px}
  .main-nav a{padding:12px 16px}
  .hero h1{font-size:1.6rem}
  .hero{padding:40px 20px 60px}
  .showcase{grid-template-columns:1fr}
  .showcase.reverse{direction:ltr}
  section{padding:40px 0}
  .content-block{padding:24px}
  .gallery{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
}