*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f0a1a;--bg2:#1a1230;--card:#221a38;
  --text:#e8e4f0;--muted:#a89ec0;
  --accent:#ff6b9d;--accent2:#ff9f43;--accent3:#7c5cff;
  --border:rgba(255,255,255,.08);--radius:12px;
  --max:1180px;--header-h:64px
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","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}
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,10,26,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}
.logo img{width:36px;height:36px;border-radius:8px}
.nav{display:flex;gap:6px;list-style:none}
.nav a{display:block;padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.95rem}
.nav a:hover,.nav a.active{color:#fff;background:rgba(124,92,255,.2)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px 8px}
.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(1.6rem,4vw,2.4rem);line-height:1.35;margin-bottom:16px;background:linear-gradient(90deg,#fff,var(--accent));-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;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.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(--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-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:.88rem;color:var(--muted)}
.hero-meta span{display:flex;align-items:center;gap:6px}
.hero-img{border-radius:16px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.section{padding:56px 0}
.section-alt{background:var(--bg2)}
.section-head{text-align:center;margin-bottom:40px}
.section-head h2{font-size:clamp(1.4rem,3vw,1.9rem);margin-bottom:10px}
.section-head p{color:var(--muted);max-width:640px;margin:0 auto}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--card);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(255,107,157,.3)}
.card-body{padding:18px}
.card-body h3{font-size:1.05rem;margin-bottom:8px;color:#fff}
.card-body p{font-size:.9rem;color:var(--muted)}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:48px}
.feature-row.reverse .feature-text{order:2}
.feature-row.reverse .feature-img{order:1}
.feature-text h3{font-size:1.3rem;margin-bottom:12px;color:#fff}
.feature-text p{color:var(--muted);margin-bottom:12px;font-size:.95rem}
.feature-text ul{margin:12px 0 0 18px;color:var(--muted);font-size:.92rem}
.feature-text li{margin-bottom:6px}
.feature-img{border-radius:14px;overflow:hidden;box-shadow:0 12px 40px rgba(0,0,0,.4)}
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.78rem;background:rgba(124,92,255,.25);color:#c4b5fd;margin-right:6px;margin-bottom:6px}
.steps{counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:28px;padding:20px;background:var(--card);border-radius:var(--radius);border:1px solid var(--border)}
.step-num{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent3));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(--muted);font-size:.92rem}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;background:var(--card)}
.faq-q{padding:16px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-a{padding:0 20px 16px;color:var(--muted);font-size:.92rem;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q{color:var(--accent)}
.breadcrumb{padding:16px 0;font-size:.88rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.page-content{padding:40px 0 60px}
.page-content h1{font-size:1.8rem;margin-bottom:20px}
.page-content h2{font-size:1.25rem;margin:28px 0 12px;color:#fff}
.page-content p,.page-content li{color:var(--muted);margin-bottom:12px;font-size:.95rem}
.page-content ul,.page-content ol{margin:0 0 16px 24px}
.legal-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-top:20px}
.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}
.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:14px;color:#fff}
.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{text-align:center;padding-top:20px;border-top:1px solid var(--border);color:var(--muted);font-size:.82rem}
.internal-links{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-top:32px}
.internal-links h3{font-size:1rem;margin-bottom:14px}
.internal-links ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px 20px}
.internal-links a{font-size:.88rem;color:var(--muted)}
.toc{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:32px}
.toc h3{font-size:.95rem;margin-bottom:10px}
.toc ol{margin-left:20px;color:var(--muted);font-size:.9rem}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--accent)}
@media(max-width:960px){
  .hero-grid,.grid-2,.grid-3,.grid-4,.feature-row,.footer-grid{grid-template-columns:1fr}
  .feature-row.reverse .feature-text,.feature-row.reverse .feature-img{order:unset}
  .nav{position:fixed;top:var(--header-h);left:0;right:0;background:var(--bg2);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:transform .3s,opacity .3s}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .menu-toggle{display:block}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:36px 0 28px}
  .section{padding:40px 0}
  .hero-btns{flex-direction:column}
  .btn{width:100%;justify-content:center}
}