*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0d12;--bg2:#16161f;--bg3:#1e1e2a;
  --text:#e8e8ef;--muted:#9a9ab0;--accent:#ff6b9d;
  --accent2:#ff9f43;--accent3:#a855f7;--border:#2a2a3a;
  --radius:12px;--max:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent2)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(13,13,18,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:36px;height:36px;border-radius:8px}
.nav-main{display:flex;gap:4px}
.nav-main a{padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.9375rem}
.nav-main a:hover,.nav-main a.active{color:var(--text);background:var(--bg3)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px 8px}

/* Hero */
.hero{padding:56px 0 48px;background:linear-gradient(180deg,#1a1028 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(1.75rem,4vw,2.5rem);line-height:1.3;margin-bottom:16px;background:linear-gradient(135deg,#fff 0%,var(--accent) 60%,var(--accent2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--muted);font-size:1.0625rem;margin-bottom:24px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-size:.9375rem;font-weight:600;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent3));color:#fff;box-shadow:0 4px 20px rgba(255,107,157,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(255,107,157,.4);color:#fff}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.hero-img{border-radius:var(--radius);overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}

/* Sections */
section{padding:56px 0}
.section-title{font-size:1.625rem;margin-bottom:8px}
.section-sub{color:var(--muted);margin-bottom:32px;font-size:1rem}
.bg-alt{background:var(--bg2)}

/* Feature cards */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--accent);transform:translateY(-3px)}
.feature-card h3{font-size:1.0625rem;margin-bottom:8px;color:var(--accent2)}
.feature-card p{color:var(--muted);font-size:.9375rem}

/* Category grid */
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.category-item{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:9/16;background:var(--bg3)}
.category-item img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.category-item:hover img{transform:scale(1.05)}
.category-label{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.85));font-size:.875rem;font-weight:600}

/* Content blocks */
.content-block{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:48px}
.content-block.reverse{direction:rtl}
.content-block.reverse>*{direction:ltr}
.content-block img{border-radius:var(--radius);box-shadow:0 8px 32px rgba(0,0,0,.4)}
.content-block h3{font-size:1.25rem;margin-bottom:12px;color:var(--accent)}
.content-block p{color:var(--muted);margin-bottom:12px;font-size:.9375rem}
.content-block ul{padding-left:20px;color:var(--muted);font-size:.9375rem}
.content-block li{margin-bottom:6px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center;position:relative}
.step-card::before{counter-increment:step;content:counter(step);display:flex;width:40px;height:40px;margin:0 auto 12px;background:linear-gradient(135deg,var(--accent),var(--accent3));border-radius:50%;align-items:center;justify-content:center;font-weight:700;font-size:1.125rem;color:#fff}
.step-card h4{margin-bottom:8px;font-size:1rem}
.step-card p{color:var(--muted);font-size:.875rem}

/* FAQ */
.faq-list{max-width:800px}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item h4{font-size:1rem;margin-bottom:8px;color:var(--accent2)}
.faq-item p{color:var(--muted);font-size:.9375rem}

/* Article / legal pages */
.page-hero{padding:48px 0 32px;background:var(--bg2);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:1.75rem;margin-bottom:8px}
.page-hero p{color:var(--muted)}
.article{padding:48px 0;max-width:860px;margin:0 auto}
.article h2{font-size:1.375rem;margin:32px 0 12px;color:var(--accent2)}
.article h3{font-size:1.125rem;margin:24px 0 8px}
.article p,.article li{color:var(--muted);margin-bottom:12px;font-size:.9375rem}
.article ul,.article ol{padding-left:24px;margin-bottom:16px}
.article a{text-decoration:underline}

/* 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:4rem;background:linear-gradient(135deg,var(--accent),var(--accent3));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}
.error-page p{color:var(--muted);margin-bottom:24px;font-size:1.0625rem}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand p{color:var(--muted);font-size:.875rem;margin-top:12px;max-width:360px}
.footer-col h4{font-size:.9375rem;margin-bottom:12px;color:var(--text)}
.footer-col a{display:block;color:var(--muted);font-size:.875rem;padding:4px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:var(--muted);font-size:.8125rem}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.875rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 8px}

/* Internal link highlight */
.inline-links{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.inline-links a{padding:6px 14px;background:var(--bg3);border:1px solid var(--border);border-radius:20px;font-size:.8125rem;color:var(--muted)}
.inline-links a:hover{border-color:var(--accent);color:var(--accent)}

/* Responsive */
@media(max-width:992px){
  .hero-grid,.content-block{grid-template-columns:1fr}
  .content-block.reverse{direction:ltr}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .category-grid{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-main{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg2);flex-direction:column;padding:12px;border-bottom:1px solid var(--border)}
  .nav-main.open{display:flex}
  .menu-toggle{display:block}
  .features-grid,.category-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:36px 0}
  section{padding:40px 0}
}
@media(max-width:480px){
  .category-grid{grid-template-columns:1fr 1fr}
  .hero-btns{flex-direction:column}
  .btn{width:100%;justify-content:center}
}