/* =========================================================
   site.css — 电玩城棋牌 共享层
   暗夜街机 / 霓虹矩阵 / 左右分置导航 / 编号章节
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0A0A12;
  --ink-deep:#07070E;
  --ink-purple:#1A1033;
  --ink-purple-2:#12082A;
  --fog:#F2F4FF;
  --silver:#C7CBD6;

  --purple:#B026FF;
  --blue:#00C2FF;
  --red:#FF2E4D;
  --yellow:#FFC94A;
  --green:#8CFF3D;
  --teal:#00FFD1;

  --line:rgba(199,203,214,.16);
  --line-strong:rgba(199,203,214,.32);

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"Cascadia Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1280px;
  --gutter:clamp(1rem,4vw,3.5rem);
  --header-h:4.5rem;
  --joystick-h:4rem;
  --cut:14px;
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body,
h1,h2,h3,h4,h5,h6,
p,figure,blockquote,dl,dd{ margin:0; }

ul,ol{ margin:0; padding:0; list-style:none; }

img,svg,video{ display:block; max-width:100%; }

button{ font:inherit; color:inherit; background:none; border:0; padding:0; cursor:pointer; }

a{ color:inherit; text-decoration:none; }

/* ---------- 3. 中文排版与底色 ---------- */
body{
  background-color:var(--ink);
  background-image:
    radial-gradient(60rem 40rem at 88% -8%, rgba(176,38,255,.16), transparent 64%),
    radial-gradient(52rem 38rem at -4% 4%, rgba(0,194,255,.12), transparent 62%);
  background-repeat:no-repeat;
  color:var(--fog);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  min-height:100vh;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:repeating-linear-gradient(0deg, rgba(242,244,255,.028) 0 1px, transparent 1px 3px);
  opacity:.65;
}

h1,h2,h3,h4{
  font-family:var(--font-sans);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.015em;
  color:var(--fog);
}
h1{ font-size:clamp(2.5rem,7vw,5rem); }
h2{ font-size:clamp(1.75rem,3.4vw,3rem); }
h3{ font-size:clamp(1.15rem,2vw,1.5rem); line-height:1.32; }

strong,b{ font-weight:800; }

::selection{ background:var(--purple); color:var(--fog); }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:3px;
  border-radius:2px;
}

#main-content{ scroll-margin-top:calc(var(--header-h) + 1rem); }

/* ---------- 4. 布局骨架 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.grid{ display:grid; gap:1.25rem; }
.grid--2{ grid-template-columns:repeat(auto-fit,minmax(min(100%,17rem),1fr)); }
.grid--3{ grid-template-columns:repeat(auto-fit,minmax(min(100%,13rem),1fr)); }

.rule{
  height:1px;
  border:0;
  background:var(--line);
  margin-block:clamp(1.5rem,4vw,2.5rem);
}

/* ---------- 5. 跳转链 ---------- */
.skip-link{
  position:fixed;
  top:.5rem;
  left:.5rem;
  z-index:200;
  padding:.7rem 1.2rem;
  background:var(--yellow);
  color:var(--ink);
  font-weight:800;
  font-size:.85rem;
  letter-spacing:.06em;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus{ transform:translateY(0); }

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(10,10,18,.9);
  -webkit-backdrop-filter:blur(12px) saturate(140%);
  backdrop-filter:blur(12px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  pointer-events:none;
  background:linear-gradient(90deg,transparent,var(--purple) 22%,var(--blue) 62%,transparent);
  opacity:.75;
}

.header-inner{
  display:flex;
  align-items:center;
  gap:1rem;
  min-height:var(--header-h);
  padding-block:.55rem;
}

/* 品牌铭牌 */
.brand{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:.1rem;
  margin-right:auto;
  padding-left:.9rem;
}
.brand::before{
  content:"";
  position:absolute;
  left:0;
  top:.15rem;
  bottom:.15rem;
  width:3px;
  background:linear-gradient(180deg,var(--purple),var(--blue));
  box-shadow:0 0 12px rgba(176,38,255,.85);
}
.brand-mark{
  font-weight:900;
  font-size:1.05rem;
  line-height:1.2;
  letter-spacing:.04em;
  color:var(--fog);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.625rem;
  line-height:1.3;
  letter-spacing:.22em;
  color:var(--silver);
  text-transform:uppercase;
}

/* 右侧工具位 */
.header-utils{
  display:flex;
  align-items:center;
  gap:.6rem;
  flex-shrink:0;
}

.header-cta{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.5rem 1rem;
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--ink);
  background:var(--yellow);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:background .18s ease,transform .18s ease;
}
.header-cta::after{ content:"▸"; font-size:.85em; }
.header-cta:hover{ background:var(--green); transform:translateY(-1px); }
.header-cta:active{ transform:translateY(0); }

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .75rem;
  border:1px solid var(--line-strong);
  border-radius:2px;
  color:var(--fog);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{ border-color:var(--purple); color:var(--purple); }
.nav-toggle-bars{
  display:flex;
  flex-direction:column;
  gap:3px;
  width:16px;
}
.nav-toggle-bars span{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform .2s ease,opacity .2s 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); }

/* 主导航 */
.site-nav{ flex-shrink:0; }

.nav-list{
  display:flex;
  align-items:center;
  gap:.1rem;
}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.5rem .65rem;
  font-size:.85rem;
  font-weight:600;
  line-height:1.4;
  color:var(--silver);
  white-space:nowrap;
  transition:color .18s ease;
}
.nav-link::before{
  content:attr(data-index);
  font-family:var(--font-mono);
  font-size:.6rem;
  font-weight:400;
  letter-spacing:.04em;
  color:var(--purple);
  opacity:.7;
  transition:opacity .18s ease;
}
.nav-link:hover{ color:var(--fog); }
.nav-link:hover::before{ opacity:1; }
.nav-link[aria-current="page"]{ color:var(--fog); }
.nav-link[aria-current="page"]::before{ color:var(--teal); opacity:1; }
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:.65rem;
  right:.65rem;
  bottom:.2rem;
  height:2px;
  background:var(--purple);
  box-shadow:0 0 10px var(--purple);
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  padding-top:clamp(2.5rem,5vw,4rem);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(176,38,255,.18), transparent 62%),
    radial-gradient(100% 80% at 92% 8%, rgba(0,194,255,.13), transparent 60%),
    var(--ink-deep);
  border-top:1px solid var(--line);
  color:var(--fog);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,var(--purple),var(--blue) 55%,transparent);
  opacity:.65;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1.6fr 1.4fr;
  gap:2rem;
  padding-bottom:clamp(2rem,4vw,3rem);
}

.footer-brand{ min-width:0; }
.footer-logo{
  font-weight:900;
  font-size:1.4rem;
  letter-spacing:.05em;
  line-height:1.2;
  color:var(--fog);
  padding-left:.8rem;
  border-left:3px solid var(--purple);
}
.footer-line{
  margin-top:.85rem;
  font-size:.95rem;
  color:var(--yellow);
  letter-spacing:.04em;
}
.footer-meta{
  margin-top:.5rem;
  font-size:.7rem;
  letter-spacing:.08em;
  color:var(--silver);
  opacity:.85;
}

.footer-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1.5rem;
}
.footer-col{ min-width:0; }
.footer-col-title{
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--purple);
  padding-bottom:.55rem;
  margin-bottom:.75rem;
  border-bottom:1px solid var(--line);
  line-height:1.4;
}
.footer-list li{ margin:0; }
.footer-link{
  display:inline-block;
  padding:.28rem 0;
  font-size:.9rem;
  color:var(--silver);
  transition:color .18s ease,transform .18s ease;
}
.footer-link:hover{ color:var(--fog); transform:translateX(4px); }
.footer-link[aria-current="page"]{ color:var(--teal); }

.footer-legal{ min-width:0; }
.footer-contact{
  font-size:.78rem;
  line-height:1.9;
  letter-spacing:.02em;
  color:var(--silver);
  word-break:break-word;
}
.footer-note{
  margin-top:.6rem;
  font-size:.75rem;
  line-height:1.65;
  color:var(--silver);
  opacity:.72;
}
.legal-list{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem .9rem;
  margin-top:1rem;
}
.legal-link{
  font-size:.8rem;
  color:var(--silver);
  padding-bottom:1px;
  border-bottom:1px solid var(--line-strong);
  transition:color .18s ease,border-color .18s ease;
}
.legal-link:hover{ color:var(--teal); border-color:var(--teal); }
.legal-link[aria-current="page"]{ color:var(--teal); border-color:var(--teal); }

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem;
  padding-block:1.15rem;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--silver);
}
.footer-copy{ opacity:.8; }
.footer-icp{ color:var(--silver); opacity:.7; }

/* ---------- 8. 底部摇杆条 ---------- */
.joystick-bar{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:70;
  display:none;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:rgba(26,16,51,.97);
  border-top:1px solid var(--line-strong);
  box-shadow:0 -12px 32px rgba(0,0,0,.6);
  padding-bottom:env(safe-area-inset-bottom,0px);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.joystick-link{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:.15rem;
  min-height:var(--joystick-h);
  padding:.35rem .2rem;
  font-size:.7rem;
  letter-spacing:.06em;
  color:var(--silver);
  border-top:2px solid transparent;
  transition:color .18s ease,background .18s ease;
}
.joystick-glyph{
  font-family:var(--font-mono);
  font-size:.95rem;
  line-height:1;
  color:var(--purple);
  transition:color .18s ease;
}
.joystick-link:hover{ color:var(--fog); }
.joystick-link[aria-current="page"]{
  color:var(--teal);
  border-top-color:var(--teal);
  background:rgba(0,255,209,.08);
}
.joystick-link[aria-current="page"] .joystick-glyph{ color:var(--teal); }

/* ---------- 9. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.7rem 1.25rem;
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.12em;
  line-height:1.4;
  color:var(--fog);
  background:rgba(26,16,51,.7);
  border:1px solid var(--line-strong);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{ transform:translateY(-1px); border-color:var(--blue); color:var(--blue); }
.btn:active{ transform:translateY(0); }
.btn--primary{ background:var(--yellow); color:var(--ink); border-color:transparent; }
.btn--primary:hover{ background:var(--green); color:var(--ink); border-color:transparent; }
.btn--ghost{ background:transparent; }

.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.3rem .75rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  line-height:1.6;
  color:var(--silver);
  background:rgba(26,16,51,.7);
  border:1px solid var(--line-strong);
  border-radius:999px;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.chip:hover{ color:var(--fog); border-color:var(--purple); }
.chip[aria-pressed="true"]{
  color:var(--ink);
  background:var(--teal);
  border-color:var(--teal);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.3em;
  text-transform:uppercase;
  line-height:1.6;
  color:var(--teal);
}
.eyebrow::before{
  content:"";
  width:1.75rem;
  height:1px;
  background:var(--teal);
  box-shadow:0 0 8px var(--teal);
}

.card{
  position:relative;
  padding:1.5rem;
  background:linear-gradient(160deg,rgba(26,16,51,.92),rgba(10,10,18,.94));
  border:1px solid var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:border-color .2s ease,transform .2s ease;
}
.card:hover{ border-color:var(--purple); transform:translateY(-2px); }

.panel{
  position:relative;
  padding:clamp(1.25rem,3vw,2.25rem);
  background:rgba(26,16,51,.55);
  border:1px solid var(--line);
}

.mono{ font-family:var(--font-mono); letter-spacing:.04em; }

.prose{ max-width:42rem; }
.prose > * + *{ margin-top:1.1em; }
.prose p{ color:var(--silver); line-height:1.8; }
.prose h2{ font-size:clamp(1.5rem,2.6vw,2.1rem); margin-top:2em; }
.prose h3{ color:var(--fog); margin-top:1.6em; }
.prose ul,.prose ol{ padding-left:1.15rem; color:var(--silver); }
.prose ul li{ list-style:none; position:relative; padding-left:.9rem; }
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:.45rem;
  height:.45rem;
  background:var(--purple);
  transform:rotate(45deg);
}
.prose ol{ list-style:decimal; }
.prose ol li::marker{ color:var(--yellow); font-family:var(--font-mono); font-size:.85em; }
.prose a{ color:var(--blue); border-bottom:1px solid rgba(0,194,255,.4); }
.prose a:hover{ border-color:var(--blue); }
.prose code{
  font-family:var(--font-mono);
  font-size:.88em;
  padding:.1em .4em;
  color:var(--teal);
  background:rgba(0,255,209,.1);
  border-radius:2px;
}

.breadcrumb{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  color:var(--silver);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
}
.breadcrumb li{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
}
.breadcrumb li::after{ content:"/"; color:var(--purple); }
.breadcrumb li:last-child::after{ content:none; }
.breadcrumb a{ color:var(--silver); transition:color .18s ease; }
.breadcrumb a:hover{ color:var(--blue); }
.breadcrumb [aria-current="page"]{ color:var(--fog); }

.media-frame{
  position:relative;
  display:block;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background:
    linear-gradient(142deg,#1A1033 0%,#0A0A12 58%,#12082A 100%);
  border:1px solid var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(10,10,18,.3) 0 1px,transparent 1px 3px);
  opacity:.5;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }

/* ---------- 10. 交互反馈与动效 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  z-index:90;
  pointer-events:none;
  background:linear-gradient(90deg,var(--purple),var(--blue) 55%,var(--teal));
  box-shadow:0 0 12px rgba(0,194,255,.7);
  transform:scaleX(0);
  transform-origin:0 50%;
}

.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s ease,transform .5s cubic-bezier(.22,.8,.3,1);
}
.js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1151px){
  .nav-toggle{ display:inline-flex; }

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:1.25rem var(--gutter) 2rem;
    background:linear-gradient(180deg,#150B2E 0%,#0A0A12 100%);
    border-bottom:1px solid var(--purple);
    box-shadow:0 24px 60px rgba(0,0,0,.72);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:transform .22s ease,opacity .22s ease,visibility .22s;
  }
  .site-nav[data-open]{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-link{
    display:flex;
    justify-content:space-between;
    padding:.9rem .25rem;
    font-size:1.05rem;
    border-bottom:1px solid var(--line);
  }
  .nav-link::before{ order:2; font-size:.75rem; }
  .nav-link[aria-current="page"]::after{
    left:0;
    right:0;
    bottom:0;
  }
}

@media (max-width:899px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-brand{ grid-column:1 / -1; }
}

@media (max-width:767px){
  body{ padding-bottom:calc(var(--joystick-h) + env(safe-area-inset-bottom,0px)); }
  .joystick-bar{ display:grid; }
  .footer-base{ padding-block:1rem; }
}

@media (max-width:599px){
  .footer-grid{ grid-template-columns:1fr; }
  .footer-nav{ grid-template-columns:1fr 1fr; }
  .header-cta{ padding:.45rem .75rem; font-size:.7rem; }
  .nav-toggle{ padding:.45rem .6rem; }
  .nav-toggle-text{ display:none; }
  .brand-mark{ font-size:.98rem; }
  .brand-sub{ font-size:.575rem; letter-spacing:.16em; }
}

@media (max-width:379px){
  .header-cta{ display:none; }
}

/* ---------- 12. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }

  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }

  .js [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }

  .card:hover,
  .btn:hover,
  .header-cta:hover,
  .footer-link:hover{ transform:none; }
}