*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f0f1a;--bg2:#1a1a2e;--bg3:#252540;
  --accent:#ff6b35;--accent2:#ff4081;--accent3:#7c4dff;
  --text:#e8e8f0;--text2:#a0a0b8;--border:#2e2e48;
  --radius:12px;--shadow:0 4px 24px rgba(0,0,0,.35);
  --max:1200px;--header-h:64px
}
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}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,15,26,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h)}
.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-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:36px;height:36px;border-radius:8px}
.nav-desktop{display:flex;gap:6px}
.nav-desktop a{padding:8px 14px;border-radius:8px;color:var(--text2);font-size:.9rem}
.nav-desktop a:hover,.nav-desktop a.active{color:var(--accent);background:rgba(255,107,53,.1)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:4px 8px}
.nav-mobile{display:none;position:fixed;top:var(--header-h);left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:12px 20px;flex-direction:column;gap:4px;z-index:99}
.nav-mobile.open{display:flex}
.nav-mobile a{padding:12px 16px;border-radius:8px;color:var(--text2)}
.nav-mobile a:hover{color:var(--accent);background:rgba(255,107,53,.08)}

/* Hero */
.hero{padding:60px 0 48px;background:linear-gradient(135deg,var(--bg2) 0%,var(--bg) 60%);border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:2.2rem;line-height:1.3;margin-bottom:16px;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{color:var(--text2);font-size:1.05rem;margin-bottom:28px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:1rem;font-weight:600;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 16px rgba(255,64,129,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(255,64,129,.4);color:#fff}
.btn-outline{background:transparent;border:2px 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:var(--shadow);border:1px solid var(--border)}

/* Sections */
section{padding:56px 0}
section:nth-child(even){background:var(--bg2)}
.section-title{font-size:1.6rem;margin-bottom:8px;color:var(--text)}
.section-sub{color:var(--text2);margin-bottom:32px;font-size:.95rem}
.section-title::before{content:"";display:inline-block;width:4px;height:1.1em;background:linear-gradient(var(--accent),var(--accent2));margin-right:10px;vertical-align:middle;border-radius:2px}

/* Feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.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:1.1rem;margin-bottom:10px;color:var(--accent)}
.feature-card p{color:var(--text2);font-size:.9rem}

/* Category grid */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-item{background:var(--bg3);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:transform .2s,border-color .2s}
.cat-item:hover{transform:translateY(-4px);border-color:var(--accent2)}
.cat-item img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.cat-item figcaption{padding:12px 14px;font-size:.85rem;color:var(--text2)}
.cat-item figcaption strong{display:block;color:var(--text);font-size:.95rem;margin-bottom:4px}

/* Content blocks */
.content-block{margin-bottom:32px}
.content-block h2{font-size:1.35rem;margin:28px 0 14px;color:var(--text);padding-left:12px;border-left:3px solid var(--accent)}
.content-block h3{font-size:1.1rem;margin:20px 0 10px;color:var(--accent2)}
.content-block p,.content-block li{color:var(--text2);margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:16px}
.content-block li{margin-bottom:6px}

/* Two column layout */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.two-col img{border-radius:var(--radius);border:1px solid var(--border)}

/* Steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;text-align:center;position:relative}
.step::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:50%;font-weight:700;font-size:.9rem;margin:0 auto 14px;color:#fff}
.step h4{font-size:.95rem;margin-bottom:8px}
.step p{font-size:.85rem;color:var(--text2)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{padding:16px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-q::after{content:"+";font-size:1.2rem;color:var(--accent);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(--text2);font-size:.9rem}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--text2)}
.breadcrumb a{color:var(--text2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{margin:0 8px}

/* Page content */
.page-hero{padding:40px 0 32px;background:var(--bg2);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:1.8rem;margin-bottom:8px}
.page-hero p{color:var(--text2)}
.page-content{padding:40px 0 60px}
.container.page-content{padding:40px 20px 60px}
.page-content .legal-text h2{font-size:1.2rem;margin:28px 0 12px;color:var(--text)}
.page-content .legal-text p,.page-content .legal-text li{color:var(--text2);margin-bottom:10px;font-size:.92rem}
.page-content .legal-text ul,.page-content .legal-text ol{padding-left:24px;margin-bottom:16px}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--text2);font-size:.88rem;margin-top:12px;max-width:320px}
.footer-col h4{font-size:.9rem;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;color:var(--text2);font-size:.85rem;padding:4px 0}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;color:var(--text2);font-size:.82rem}

/* 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;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}
.error-page p{color:var(--text2);margin-bottom:24px;font-size:1.05rem}

/* Internal links box */
.link-box{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:24px 0}
.link-box h4{margin-bottom:10px;font-size:.95rem}
.link-box a{margin-right:16px;font-size:.88rem}

/* Responsive */
@media(max-width:992px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .cat-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-desktop{display:none}
  .menu-toggle{display:block}
  .hero h1{font-size:1.6rem}
  .hero{padding:36px 0 32px}
  .feature-grid,.cat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:40px 0}
  body.sub-page .page-hero .container,
  body.sub-page .container.page-content,
  body.sub-page .site-footer > .container{padding-left:20px;padding-right:20px}
  body.sub-page .error-page{padding-left:20px;padding-right:20px}
  body.sub-page .legal-text,
  body.sub-page .content-block{padding-left:4px;padding-right:4px}
}
@media(max-width:480px){
  .cat-grid{grid-template-columns:1fr 1fr}
  .hero-btns{flex-direction:column}
  .btn{width:100%;justify-content:center}
}