*{box-sizing:border-box}
html{color-scheme:dark;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.75 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
img{max-width:100%;height:auto}
a{color:var(--accent);text-underline-offset:.2em}
a:hover{text-decoration-thickness:.15em}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 92%,transparent);border-bottom:1px solid var(--border);backdrop-filter:blur(14px)}
.header-row,.brand{display:flex;align-items:center}
.header-row{min-height:76px;justify-content:space-between;gap:24px}
.brand{gap:12px;color:var(--text);font-weight:800;text-decoration:none}
.site-nav__links,.link-list{display:flex;flex-wrap:wrap;gap:12px 20px;margin:0;padding:0;list-style:none}
.site-nav a{text-decoration:none}
.nav-toggle,.nav-close{display:none}
.breadcrumb{padding-block:18px}
.breadcrumb ol{display:flex;gap:8px;list-style:none;margin:0;padding:0;font-size:.9rem}
.breadcrumb li+li:before{content:"/";margin-right:8px;color:var(--muted)}
.hero{padding:64px 0 48px;background:radial-gradient(circle at 80% 20%,var(--glow),transparent 38%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:44px}
.hero-grid>*{min-width:0}
.hero-grid img{width:100%}
h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;margin:.15em 0}
.hero-intro{font-size:1.2rem;max-width:680px}
.eyebrow{color:var(--accent);font-weight:800;letter-spacing:.08em}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-block:24px}
.button,.nav-toggle,.nav-close,.site-nav a{min-width:48px;min-height:48px;display:inline-flex;align-items:center;justify-content:center}
.button{padding:11px 20px;border-radius:999px;background:var(--accent);color:var(--button-text);font-weight:800;text-decoration:none}
.hero-note,.notice{padding:14px 18px;border-left:4px solid var(--accent);background:var(--panel)}
.section{padding:64px 0}
.section h2{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.2}
.section-tint{background:var(--panel-soft)}
.quick-grid,.card-grid,.topic-grid,.image-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:0;list-style:none}
.quick-grid a,.card,.topic,.image-card{display:block;height:100%;padding:22px;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);text-decoration:none}
.image-card{padding:0;overflow:hidden}
.image-card>a{display:block;color:var(--text);text-decoration:none}
.image-card img{width:100%;aspect-ratio:3/2;object-fit:cover}
.image-card__body,.image-card__body span{display:block}
.image-card__body{padding:20px}
.image-card__body span{color:var(--muted);margin-top:6px}
.quick-grid span{display:block;color:var(--muted);margin-top:6px}
.card p,.topic p,.prose p{color:var(--muted)}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;background:var(--panel)}
th,td{text-align:left;padding:14px;border:1px solid var(--border)}
.steps{display:grid;gap:16px;counter-reset:item;list-style:none;padding:0}
.steps li{padding:20px 20px 20px 72px;position:relative;background:var(--panel);border-radius:var(--radius)}
.steps li:before{counter-increment:item;content:counter(item);position:absolute;left:20px;top:20px;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:var(--button-text);font-weight:900}
.safety{border-block:1px solid var(--border)}
.rules-list{columns:2;gap:40px}
.faq-list{display:grid;gap:12px}
.faq-list details{padding:16px 20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel)}
.faq-list summary{cursor:pointer;font-weight:800}
.site-footer{padding:48px 0;border-top:1px solid var(--border);background:var(--footer)}
.site-footer .legal{color:var(--muted);font-size:.9rem}
.error-page{min-height:65vh;padding-block:96px}
.error-page h1{font-size:3rem}
@media(max-width:800px){
  body{font-size:16px;line-height:1.7}
  .hero{padding-top:36px}
  .hero-grid{grid-template-columns:1fr}
  .hero-grid img{order:-1;height:clamp(180px,66vw,250px);object-fit:contain}
  .quick-grid,.card-grid,.topic-grid,.image-card-grid{grid-template-columns:1fr}
  .rules-list{columns:1}
  .nav-toggle{display:inline-flex}
  .site-nav{display:none;position:absolute;inset:76px 16px auto;padding:20px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius)}
  .site-nav:target{display:block}
  .site-nav__links{display:grid}
  .nav-close{display:inline-flex;margin-top:14px}
  .section{padding:44px 0}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}