*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d0d12;--bg2:#16161f;--bg3:#1e1e2a;
  --text:#e8e8f0;--muted:#9a9ab0;
  --accent:#ff4d8d;--accent2:#ff7a45;--accent3:#7c5cff;
  --border:#2a2a3a;--radius:12px;--max:1180px;
  --shadow:0 8px 32px rgba(0,0,0,.45);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;min-height:100vh}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius)}
.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;padding:14px 20px;max-width:var(--max);margin:0 auto;gap:16px}
.logo-wrap{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:1.15rem}
.logo-wrap img{width:40px;height:40px;border-radius:10px}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:8px;cursor:pointer;font-size:1rem}
.main-nav ul{display:flex;gap:6px;list-style:none;flex-wrap:wrap}
.main-nav a{display:block;padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.92rem}
.main-nav a:hover,.main-nav a.active{color:var(--text);background:var(--bg3)}

/* Hero */
.hero{padding:56px 0 40px;background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.3;margin-bottom:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--muted);font-size:1.05rem;margin-bottom:24px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 4px 20px rgba(255,77,141,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(255,77,141,.5);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:16px;box-shadow:var(--shadow);border:1px solid var(--border)}

/* Sections */
section{padding:48px 0}
.section-title{font-size:1.6rem;margin-bottom:8px}
.section-sub{color:var(--muted);margin-bottom:28px;font-size:.95rem}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;flex-wrap:wrap}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:rgba(255,77,141,.4)}
.card-body{padding:16px}
.card-body h3{font-size:1.05rem;margin-bottom:8px}
.card-body p{color:var(--muted);font-size:.88rem;line-height:1.6}
.card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}

/* Feature rows */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;margin-bottom:48px}
.feature-row.reverse .feature-text{order:2}
.feature-row.reverse .feature-img{order:1}
.feature-text h2{font-size:1.35rem;margin-bottom:12px;color:var(--text)}
.feature-text p{color:var(--muted);margin-bottom:12px;font-size:.93rem}
.feature-text ul{margin:12px 0 0 18px;color:var(--muted);font-size:.9rem}
.feature-text li{margin-bottom:6px}
.feature-img img{border:1px solid var(--border);box-shadow:var(--shadow)}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center}
.step-num{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:50%;font-weight:700;margin-bottom:12px;font-size:.9rem}
.step h3{font-size:.95rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:.85rem}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}
.faq-item h3{font-size:1rem;margin-bottom:8px;color:var(--accent)}
.faq-item p{color:var(--muted);font-size:.9rem}

/* Content page */
.page-hero{padding:40px 0 24px;background:var(--bg2);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:1.8rem;margin-bottom:8px}
.page-hero p{color:var(--muted)}
.content-page{padding:40px 0 60px}
.content-page h2{font-size:1.25rem;margin:28px 0 12px;color:var(--text)}
.content-page h3{font-size:1.05rem;margin:20px 0 10px;color:var(--accent)}
.content-page p,.content-page li{color:var(--muted);margin-bottom:12px;font-size:.93rem}
.content-page ul,.content-page ol{margin:0 0 16px 24px}
.content-page a{color:var(--accent)}

/* Error pages */
.error-page{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.error-code{font-size:5rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.error-page h1{margin:12px 0 8px;font-size:1.5rem}
.error-page p{color:var(--muted);margin-bottom:24px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--muted);font-size:.88rem;margin-top:10px;max-width:360px}
.footer-col h4{font-size:.95rem;margin-bottom:12px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--muted);font-size:.88rem}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;color:var(--muted);font-size:.82rem}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 6px}

/* Tags */
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.75rem;background:var(--bg3);color:var(--accent);margin-right:6px;margin-bottom:6px;border:1px solid var(--border)}

/* Responsive */
@media(max-width:960px){
  .hero-grid,.feature-row,.footer-grid{grid-template-columns:1fr}
  .feature-row.reverse .feature-text,.feature-row.reverse .feature-img{order:unset}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  .header-inner{flex-wrap:wrap;position:relative}
  .main-nav{display:none;width:100%}
  .main-nav.open{display:block;position:absolute;left:0;right:0;top:100%;background:rgba(13,13,18,.98);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:12px 20px;z-index:101}
  .main-nav ul{flex-direction:column;gap:4px}
  .card-grid,.steps{grid-template-columns:1fr}
  .hero{padding:36px 0 28px}
  section{padding:32px 0}
  .footer-grid{grid-template-columns:1fr;gap:20px}
}