/* ==========================================================================
   壹号娱乐会馆 — 共享样式 /assets/site.css
   1 reset · 2 令牌 · 3 排版 · 4 布局 · 5 通用组件 · 6 页头 · 7 页脚 · 8 响应式
   ========================================================================== */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--gold-500);outline-offset:3px;border-radius:2px}
:target{scroll-margin-top:140px}

/* ---------- 2. 令牌 ---------- */
:root{
  --ink-900:#0A1A2A;
  --ink-700:#14304A;
  --ink-500:#2C5474;
  --cream-050:#FBF7EE;
  --cream-100:#F2EADA;
  --gold-500:#D8A23F;
  --gold-200:#F1D9A2;
  --celadon-500:#3F8C74;
  --coral-500:#E2673F;
  --brown-900:#241A13;
  --slate-600:#5A6672;

  --on-ink:#FBF7EE;
  --on-ink-soft:rgba(251,247,238,.74);
  --on-ink-faint:rgba(251,247,238,.55);
  --gold-line:rgba(216,162,63,.42);
  --hairline:rgba(36,26,19,.14);
  --hairline-strong:rgba(36,26,19,.26);

  --shadow-1:0 1px 2px rgba(10,26,42,.08);
  --shadow-2:0 8px 22px rgba(10,26,42,.14);

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-editorial:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Courier New",monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,44px);
  --radius:2px;
  --space-section:clamp(52px,7vw,96px);
  --ease:cubic-bezier(.4,0,.2,1);
}

/* ---------- 3. 排版 ---------- */
body{
  min-height:100vh;
  background:var(--cream-050);
  color:var(--brown-900);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:var(--font-display);font-weight:800;letter-spacing:-.01em;line-height:1.22;color:var(--ink-900)}
h1{font-size:clamp(32px,4.6vw,64px)}
h2{font-size:clamp(24px,3vw,44px)}
h3{font-size:clamp(18px,2vw,24px)}
p{max-width:76ch}
::selection{background:var(--gold-200);color:var(--ink-900)}
.mono{font-family:var(--font-mono);letter-spacing:.02em;font-variant-numeric:tabular-nums}
.mono-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  line-height:1.7;
  padding:0 7px;
  border:1px solid var(--gold-line);
  border-radius:var(--radius);
  color:var(--gold-500);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--slate-600);
}
.eyebrow--gold{color:var(--gold-500)}
.prose{max-width:72ch;font-size:17px;line-height:1.85}
.prose h2{margin-top:2.1em;margin-bottom:.5em;font-size:clamp(21px,2.4vw,28px)}
.prose h3{margin-top:1.6em;margin-bottom:.4em}
.prose p+p{margin-top:1.05em}
.prose ul,.prose ol{margin-top:1em;padding-left:1.3em;list-style:disc}
.prose li{margin-top:.4em}
.prose strong{font-weight:700;color:var(--ink-900)}

/* ---------- 4. 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:var(--space-section)}
.section--ink{background:var(--ink-900);color:var(--on-ink)}
.section--cream{background:var(--cream-100)}
.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 5. 通用组件 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:140;
  padding:10px 16px;
  background:var(--gold-500);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  line-height:1.4;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--gold{background:var(--gold-500);border-color:var(--gold-500);color:var(--ink-900)}
.btn--gold:hover{background:var(--gold-200);border-color:var(--gold-200)}
.btn--ghost{background:transparent;border-color:var(--ink-500);color:var(--cream-050)}
.btn--ghost:hover{border-color:var(--gold-500);color:var(--gold-200)}
.btn--ink{background:var(--ink-900);border-color:var(--ink-900);color:var(--cream-050)}
.btn--ink:hover{background:var(--ink-700);border-color:var(--ink-700)}
.btn--sm{padding:8px 14px;font-size:13px}

.card{
  display:block;
  padding:clamp(18px,2.2vw,24px);
  background:#fff;
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.card:hover,.card:focus-visible{border-color:var(--gold-500);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.card__index{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--gold-500)}
.card__title{margin-top:8px;font-family:var(--font-display);font-weight:800;font-size:19px;color:var(--ink-900)}
.card__text{margin-top:8px;font-size:15px;line-height:1.7;color:var(--slate-600)}
.card__meta{
  margin-top:14px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--slate-600);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 9px;
  border:1px solid currentColor;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.7;
}
.tag--live{color:var(--celadon-500)}
.tag--beta{color:var(--coral-500)}
.tag--new{color:var(--gold-500)}
.tag--muted{color:var(--slate-600)}

.panel{
  padding:clamp(18px,2.4vw,28px);
  background:var(--cream-100);
  border:1px solid var(--hairline);
  border-radius:var(--radius);
}
.panel--ink{background:var(--ink-700);border-color:var(--ink-500);color:var(--on-ink)}
.panel--ink h2,.panel--ink h3{color:var(--on-ink)}

.rule{border:0;height:1px;background:var(--hairline);margin:0}
.rule--gold{background:var(--gold-500);opacity:.55}

.index-list{border-top:1px solid var(--hairline)}
.index-list__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:14px;
  align-items:baseline;
  padding:14px 0;
  border-bottom:1px solid var(--hairline);
}
.index-list__num{font-family:var(--font-mono);font-size:12px;color:var(--gold-500)}
.index-list__title{font-family:var(--font-display);font-weight:700;font-size:16px;color:var(--ink-900)}
.index-list__meta{font-family:var(--font-mono);font-size:12px;color:var(--slate-600)}
.index-list__item a:hover .index-list__title{color:var(--ink-500)}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--slate-600);
}
.breadcrumb a{border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb a:hover{color:var(--ink-900);border-bottom-color:var(--gold-500)}
.breadcrumb__sep{color:var(--gold-500)}
.breadcrumb [aria-current="page"]{color:var(--brown-900)}

.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-700);
  border:1px solid var(--ink-500);
  border-radius:var(--radius);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x2{aspect-ratio:3/2}
.media--1x1{aspect-ratio:1/1}
.media--3x4{aspect-ratio:3/4}
.media__frame{
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg,rgba(10,26,42,0) 42%,rgba(10,26,42,.58) 100%),
    linear-gradient(90deg,rgba(216,162,63,.14) 0,rgba(216,162,63,0) 38%);
  pointer-events:none;
}
.media__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--slate-600);
}

html.has-js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
html.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink-900);
  color:var(--on-ink);
}
.site-header a{color:inherit}

.topbar{
  background:var(--ink-900);
  border-bottom:1px solid var(--ink-500);
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:36px;
  padding-block:6px;
}
.topbar__meta{
  display:flex;
  align-items:center;
  gap:10px;
  max-width:58ch;
  white-space:nowrap;
  overflow:hidden;
}
.topbar__sign{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(241,217,162,.72);
}
.topbar__contact{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--gold-200);
}
.topbar__label{color:var(--gold-500)}
.topbar__sep{color:var(--ink-500)}

.masthead{
  background:var(--ink-900);
  border-bottom:1px solid var(--gold-line);
  transition:background-color .22s var(--ease);
}
.masthead__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding-block:14px;
  transition:padding .22s var(--ease);
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:none;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  background:var(--gold-500);
  color:var(--ink-900);
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  line-height:1;
}
.brand__text{display:block;min-width:0}
.brand__name{
  display:block;
  font-family:var(--font-editorial);
  font-weight:600;
  font-size:20px;
  letter-spacing:.06em;
  color:var(--cream-050);
}
.brand__tagline{
  display:block;
  margin-top:3px;
  max-height:20px;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.02em;
  color:rgba(241,217,162,.7);
  transition:max-height .22s var(--ease),opacity .18s var(--ease);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  border:1px solid var(--ink-500);
  border-radius:var(--radius);
  color:var(--gold-200);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-500)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{font-family:var(--font-display);font-weight:700;font-size:13px;letter-spacing:.06em}

.site-nav{position:relative}
.site-nav__list{display:flex;align-items:center;gap:4px}
.site-nav__list a{
  position:relative;
  display:inline-block;
  padding:9px 12px;
  font-size:15px;
  font-weight:500;
  color:rgba(251,247,238,.86);
  border-radius:var(--radius);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__list a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:4px;
  height:1px;
  background:var(--gold-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.site-nav__list a:hover{color:var(--gold-200);background:var(--ink-700)}
.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after{transform:scaleX(1)}
.site-nav__list a[aria-current="page"]{color:var(--gold-500)}
.site-nav__list a[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__cta a{
  margin-left:8px;
  border:1px solid var(--gold-500);
  color:var(--gold-500);
  padding:8px 15px;
}
.site-nav__cta a::after{display:none}
.site-nav__cta a:hover{background:var(--gold-500);color:var(--ink-900)}
.site-nav__cta a[aria-current="page"]{background:var(--gold-500);color:var(--ink-900)}
.site-nav__status{display:none}

.site-header[data-scrolled="true"] .topbar__meta{display:none}
.site-header[data-scrolled="true"] .masthead__inner{padding-block:9px}
.site-header[data-scrolled="true"] .brand__tagline{max-height:0;opacity:0}

.scroll-meter{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--gold-500),var(--coral-500));
  pointer-events:none;
  z-index:2;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:var(--on-ink);
  border-top:1px solid var(--gold-500);
}

.register-band{
  position:relative;
  background:var(--ink-700);
  border-bottom:1px solid var(--ink-500);
  overflow:hidden;
}
.register-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(90deg,transparent 0 38px,rgba(216,162,63,.10) 38px 39px);
  pointer-events:none;
}
.register-band__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(170px,3fr) minmax(0,7fr) auto;
  align-items:center;
  gap:clamp(20px,3vw,44px);
  padding-block:clamp(24px,3.4vw,38px);
}
.register-band__brand{display:flex;align-items:center;gap:12px;min-width:0}
.register-band__steps{min-width:0}
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
  margin-top:14px;
}
.steps__item{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding-left:12px;
  border-left:1px solid var(--gold-line);
}
.steps__num{font-size:12px;color:var(--gold-500);padding-top:3px}
.steps__text{font-size:14.5px;line-height:1.6;color:var(--on-ink-soft)}
.register-band__action{display:grid;gap:10px;justify-items:start}
.register-band__note{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.02em;
  color:var(--on-ink-faint);
}

.footer-islands{padding-block:clamp(34px,5vw,56px)}
.footer-islands__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.island{min-width:0;border-top:1px solid var(--gold-line);padding-top:16px}
.island__title{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-editorial);
  font-weight:600;
  font-size:16px;
  letter-spacing:.04em;
  color:var(--gold-200);
}
.island__title .mono{font-size:11px;color:var(--gold-500)}
.island__list{display:grid;gap:9px}
.island__list a{
  position:relative;
  display:inline-block;
  width:fit-content;
  font-size:14.5px;
  color:var(--on-ink-soft);
  transition:color .18s var(--ease);
}
.island__list a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:var(--gold-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.island__list a:hover{color:var(--gold-200)}
.island__list a:hover::after,
.island__list a:focus-visible::after{transform:scaleX(1)}
.island__meta{
  margin-top:14px;
  display:grid;
  gap:4px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  letter-spacing:.02em;
  color:var(--on-ink-faint);
  word-break:break-word;
}

.footer-bottom{
  border-top:1px solid var(--ink-500);
  padding-block:16px;
}
.footer-bottom__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 22px;
}
.footer-bottom__item{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:rgba(251,247,238,.62);
}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1100px){
  .site-nav__list a{padding:9px 9px;font-size:14.5px}
  .register-band__inner{grid-template-columns:minmax(160px,2fr) minmax(0,6fr) auto}
}

@media (max-width:940px){
  .topbar__sign{display:none}
  .masthead__inner{gap:14px}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    z-index:120;
    width:min(320px,84vw);
    padding:24px 18px;
    overflow-y:auto;
    background:var(--ink-700);
    border-right:1px solid var(--gold-500);
    transform:translateX(-100%);
    transition:transform .24s var(--ease);
    box-shadow:none;
  }
  .site-nav[data-open]{
    transform:translateX(0);
    box-shadow:0 0 0 100vmax rgba(10,26,42,.62);
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__list a{
    display:block;
    padding:13px 12px;
    font-size:16px;
    border-left:2px solid transparent;
    border-bottom:1px solid rgba(44,84,116,.6);
    border-radius:0;
  }
  .site-nav__list a::after{display:none}
  .site-nav__list a:hover{background:rgba(216,162,63,.10);border-left-color:var(--gold-500)}
  .site-nav__list a[aria-current="page"]{background:rgba(216,162,63,.12);border-left-color:var(--gold-500)}
  .site-nav__cta a{
    margin-left:0;
    margin-top:12px;
    border:1px solid var(--gold-500);
    border-radius:var(--radius);
  }
  .site-nav__status{
    display:block;
    margin-top:18px;
    padding-top:14px;
    border-top:1px solid var(--gold-line);
    font-family:var(--font-mono);
    font-size:11.5px;
    line-height:1.9;
    color:rgba(241,217,162,.72);
  }

  .register-band__inner{grid-template-columns:minmax(0,1fr);gap:22px}
  .footer-islands__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .index-list__item{grid-template-columns:auto minmax(0,1fr);row-gap:4px}
  .index-list__meta{grid-column:2}
}

@media (max-width:700px){
  .topbar__meta{display:none}
  .topbar__contact{justify-content:flex-start;font-size:11.5px;gap:8px}
  .topbar__inner{padding-block:8px}
  .brand__mark{width:32px;height:32px;font-size:17px}
  .brand__name{font-size:17px}
  .brand__tagline{display:none}
  .steps{grid-template-columns:minmax(0,1fr);gap:10px}
  .footer-bottom__inner{justify-content:flex-start}
}

@media (max-width:620px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-islands__grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .register-band__action{justify-items:stretch}
  .register-band__action .btn{width:100%}
}

@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.has-js [data-reveal]{opacity:1;transform:none}
  .card:hover,.card:focus-visible{transform:none}
}