/* =========================================================
   大发电子游戏 · 共享样式 /assets/site.css
   框架式导航 + 堆叠面板 + 霓虹街机夜色
   ========================================================= */

:root{
  --ink:#0A0614;
  --panel:#160C2B;
  --violet:#7A3CFF;
  --cyan:#25E1D6;
  --neon:#F2FF4D;
  --rose:#FF3D7F;
  --white:#F1ECFF;
  --muted:#A99BC9;
  --line:#3B2A66;
  --teal:#06181C;
  --grad:linear-gradient(135deg,#7A3CFF 0%,#25E1D6 100%);
  --shadow:0 18px 40px rgba(10,6,20,.6);
  --ease:cubic-bezier(.2,.7,.3,1);
  --rail:88px;
  --font-title:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  min-height:100vh;
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 印刷感外框 */
body::after{
  content:"";
  position:fixed;
  inset:0;
  border:1px solid var(--line);
  pointer-events:none;
  z-index:70;
}

img{max-width:100%;height:auto;display:block;}
button{font:inherit;color:inherit;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

a{color:inherit;}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-title);
  font-weight:900;
  line-height:1.1;
  margin:0 0 .5em;
  color:var(--white);
  letter-spacing:-.01em;
}
h1{font-size:clamp(46px,8.5vw,128px);letter-spacing:-.03em;line-height:1.02;}
h2{font-size:clamp(30px,4.6vw,62px);}
h3{font-size:clamp(22px,2.4vw,26px);}
h4{font-size:18px;}

p{margin:0 0 1.1em;}

.muted{color:var(--muted);}

.mono{
  font-family:var(--font-mono);
  font-size:.9em;
  letter-spacing:.04em;
  color:var(--neon);
  background:rgba(242,255,77,.10);
  border-radius:2px;
  padding:1px 6px;
  white-space:nowrap;
}

/* ---------- 链接 ---------- */
.link{
  position:relative;
  color:var(--cyan);
  text-decoration:none;
  padding-bottom:2px;
  transition:color .18s var(--ease);
}
.link::after{
  content:"";
  position:absolute;
  left:0;right:100%;bottom:0;
  height:1px;
  background:var(--cyan);
  transition:right .2s var(--ease);
}
.link:hover::after,.link:focus-visible::after{right:0;}
.link:hover{color:var(--white);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-title);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.08em;
  text-decoration:none;
  padding:12px 20px;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--white);
  background:transparent;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease),color .18s var(--ease),
             box-shadow .18s var(--ease);
}
.btn--primary{
  background:var(--grad);
  border-color:transparent;
  color:#0A0614;
}
.btn--primary:hover,.btn--primary:focus-visible{
  transform:translateY(-2px);
  box-shadow:0 8px 22px rgba(122,60,255,.45);
}
.btn--ghost{
  color:var(--cyan);
  border-color:var(--cyan);
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  background:var(--cyan);
  color:var(--ink);
  transform:translateY(-2px);
}
.btn--sm{font-size:12px;padding:8px 12px;letter-spacing:.06em;}
.btn--block{width:100%;}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:-9999px;
  top:0;
  z-index:200;
  background:var(--neon);
  color:#0A0614;
  font-weight:700;
  font-size:14px;
  letter-spacing:.06em;
  text-decoration:none;
  padding:10px 18px;
  border-radius:0 0 3px 0;
}
.skip-link:focus{left:0;}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:0;
  height:2px;
  background:var(--grad);
  z-index:60;
  pointer-events:none;
  transition:width .1s linear;
}

/* =========================================================
   头部：框架式导航轨
   ========================================================= */
.site-header{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail);
  z-index:50;
  background:var(--ink);
  border-right:1px solid var(--line);
  display:flex;
}
.site-header__frame{
  display:flex;
  flex-direction:column;
  width:100%;
  height:100%;
  padding:16px 10px 20px;
  gap:16px;
  overflow-y:auto;
  overflow-x:hidden;
}

.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
  text-decoration:none;
  color:var(--white);
}
.brand__mark{
  position:relative;
  display:block;
  width:34px;
  height:34px;
  flex:0 0 auto;
  border-radius:3px;
  background:var(--grad);
  box-shadow:0 0 18px rgba(122,60,255,.55);
}
.brand__mark i{
  position:absolute;
  width:6px;height:6px;
  background:#0A0614;
  border-radius:1px;
}
.brand__mark i:nth-child(1){top:8px;left:8px;}
.brand__mark i:nth-child(2){top:8px;left:20px;}
.brand__mark i:nth-child(3){top:20px;left:14px;}
.brand__text{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:1px;
}
.brand__name{
  font-family:var(--font-title);
  font-size:13px;
  font-weight:900;
  letter-spacing:.06em;
  line-height:1.25;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.08em;
  line-height:1.3;
  color:var(--muted);
  text-align:center;
}

.nav-toggle{display:none;}

.site-nav{
  display:flex;
  flex-direction:column;
  flex:1 1 auto;
  gap:12px;
  min-height:0;
}
.site-nav__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.site-nav__item{min-width:0;}
.site-nav__link{
  position:relative;
  display:block;
  padding:9px 4px;
  font-size:11.5px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.02em;
  text-align:center;
  text-decoration:none;
  color:var(--muted);
  border-radius:2px;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:2px;
  height:0;
  transform:translateY(-50%);
  background:var(--cyan);
  transition:height .18s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  color:var(--white);
  background:rgba(122,60,255,.16);
}
.site-nav__link:hover::before,
.site-nav__link:focus-visible::before{height:16px;}
.site-nav__link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(37,225,214,.10);
}
.site-nav__link[aria-current="page"]::before{height:22px;background:var(--cyan);}

.site-header__actions{
  display:flex;
  flex-direction:column;
  gap:8px;
  margin-top:auto;
}
.site-header__actions .btn{
  width:100%;
  font-size:11px;
  padding:8px 4px;
  letter-spacing:.02em;
  text-align:center;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  border-top:1px solid var(--line);
  background:var(--teal);
}
.site-footer__inner{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) clamp(16px,4vw,56px) 28px;
}
.site-footer__top{
  display:grid;
  grid-template-columns:1.3fr 3fr;
  gap:clamp(24px,4vw,64px);
}
.site-footer__brand{min-width:0;}
.site-footer__brand .brand__mark{margin-bottom:12px;}
.site-footer__brand-name{
  margin:0 0 4px;
  font-family:var(--font-title);
  font-size:20px;
  font-weight:900;
  letter-spacing:.04em;
  color:var(--white);
}
.site-footer__brand-line{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,3vw,32px);
}
.foot-col{min-width:0;}
.foot-col__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--cyan);
  text-transform:uppercase;
}
.foot-col__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.foot-col__link{
  display:inline-block;
  font-size:15px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.foot-col__link:hover,
.foot-col__link:focus-visible{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.site-footer__contact{
  margin-top:clamp(28px,4vw,48px);
  padding-top:22px;
  border-top:1px solid var(--line);
}
.site-footer__contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
  margin:0 0 10px;
  font-size:14px;
}
.site-footer__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
}
.copy-btn{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:2px;
  background:transparent;
  color:var(--cyan);
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease);
}
.copy-btn:hover,.copy-btn:focus-visible{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
}
.copy-status{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--neon);
  min-height:1em;
}
.site-footer__note{
  margin:0;
  font-size:13px;
  color:var(--muted);
}
.site-footer__legal{
  margin-top:24px;
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
}
.site-footer__legal p{
  margin:0;
  font-family:inherit;
  font-size:inherit;
  line-height:1.6;
  color:inherit;
}

/* =========================================================
   布局工具
   ========================================================= */
#main-content{display:block;}
.site-main{padding:0;}

.container{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,56px);
}
.prose{max-width:720px;}
.prose p{color:var(--white);}

.section{
  position:relative;
  padding-block:clamp(40px,7vw,96px);
}
.section__eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--cyan);
  text-transform:uppercase;
}
.section__eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--cyan);
}
.section__title{
  margin:0 0 14px;
  font-size:clamp(30px,4.6vw,62px);
}
.section__lead{
  max-width:720px;
  margin:0 0 26px;
  font-size:17px;
  color:var(--muted);
}

.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--asym{grid-template-columns:5fr 7fr;align-items:start;}
.grid__aside{min-width:0;}
.grid__main{min-width:0;}

/* ---------- 堆叠面板 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:4px;
  padding:clamp(20px,3.2vw,42px);
  box-shadow:var(--shadow);
}
.panel--flat{box-shadow:none;}
.panel--accent::before{
  content:"";
  position:absolute;
  top:-1px;left:-1px;right:-1px;
  height:3px;
  background:var(--grad);
  border-radius:4px 4px 0 0;
}
.panel--stack{
  box-shadow:
    10px 10px 0 -1px var(--ink),
    10px 10px 0 0 var(--line),
    20px 20px 0 -1px var(--ink),
    20px 20px 0 0 rgba(59,42,102,.55),
    var(--shadow);
}
.panel__label{
  display:inline-block;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
  text-transform:uppercase;
}

/* ---------- 横向主题带 ---------- */
.band{
  position:relative;
  border-block:1px solid var(--line);
  background:var(--teal);
  padding-block:clamp(36px,6vw,88px);
  overflow:hidden;
}
.band--grad{
  background:var(--grad);
  color:#0A0614;
  border-color:transparent;
}
.band--grad .section__title,
.band--grad h2,
.band--grad h3{color:#0A0614;}
.band--grad .section__eyebrow,
.band--grad .section__lead,
.band--grad p{color:rgba(10,6,20,.82);}
.band--grad .section__eyebrow::before{background:#0A0614;}
.band__inner{
  position:relative;
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,56px);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.08em;
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--muted);
  background:rgba(59,42,102,.22);
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease);
}
.tag--size{
  background:var(--neon);
  border-color:var(--neon);
  color:#12102A;
}
.tag--spec{
  background:transparent;
  border-color:var(--cyan);
  color:var(--cyan);
}
.tag--rose{
  background:var(--rose);
  border-color:var(--rose);
  color:#2A0416;
}
.tag--violet{
  background:var(--violet);
  border-color:var(--violet);
  color:var(--white);
}
.tag:hover,.tag:focus-visible{
  background:var(--violet);
  border-color:var(--violet);
  color:var(--white);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 20px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumbs a{
  color:var(--cyan);
  text-decoration:none;
}
.breadcrumbs a:hover{text-decoration:underline;}
.breadcrumbs__sep{color:var(--line);}
.breadcrumbs [aria-current="page"]{color:var(--white);}

/* ---------- 步骤（技能树） ---------- */
.steps{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:14px;
}
.steps__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:14px;
  padding:14px 16px;
  border:1px solid var(--line);
  border-radius:3px;
  background:rgba(22,12,43,.62);
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.steps__item:hover,
.steps__item:focus-within{
  border-color:var(--cyan);
  transform:translateY(-2px);
}
.steps__node{
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:2px;
  background:var(--grad);
  color:#0A0614;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
}
.steps__title{
  margin:0;
  font-family:var(--font-title);
  font-size:16px;
  font-weight:800;
  line-height:1.5;
}
.steps__desc{
  margin:4px 0 0;
  font-size:14px;
  line-height:1.6;
  color:var(--muted);
  max-height:0;
  opacity:0;
  overflow:hidden;
  transition:max-height .22s var(--ease),opacity .22s var(--ease);
}
.steps__item:hover .steps__desc,
.steps__item:focus-within .steps__desc{
  max-height:90px;
  opacity:1;
}

/* ---------- 数字块 ---------- */
.stat{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:10px 12px;
  border-left:2px solid var(--violet);
  background:rgba(59,42,102,.18);
}
.stat__value{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  line-height:1.2;
  color:var(--neon);
  letter-spacing:.02em;
}
.stat__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:3px;
  background:
    linear-gradient(135deg,rgba(122,60,255,.34),rgba(37,225,214,.12) 62%,rgba(10,6,20,0)),
    var(--panel);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(241,236,255,.10) 1px,transparent 1px);
  background-size:14px 14px;
  pointer-events:none;
}
.media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--1x1{aspect-ratio:1/1;}
.media--21x9{aspect-ratio:21/9;}
.media__caption{
  position:relative;
  z-index:1;
  padding:10px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
  background:rgba(10,6,20,.72);
}

/* ---------- 渐显 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.has-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* =========================================================
   响应式
   ========================================================= */
@media (min-width:1024px){
  body{padding-left:var(--rail);}
  .scroll-progress{left:var(--rail);}
}

@media (max-width:1023px){
  .site-header{
    position:sticky;
    top:0;left:0;right:0;bottom:auto;
    width:100%;
    height:auto;
    border-right:0;
    border-bottom:1px solid var(--line);
    background:rgba(10,6,20,.96);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
  }
  .site-header__frame{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    height:auto;
    padding:10px 16px;
    overflow:visible;
  }
  .brand{
    flex-direction:row;
    align-items:center;
    gap:10px;
    padding-bottom:0;
    border-bottom:0;
  }
  .brand__mark{width:30px;height:30px;}
  .brand__mark i:nth-child(1){top:7px;left:7px;}
  .brand__mark i:nth-child(2){top:7px;left:17px;}
  .brand__mark i:nth-child(3){top:17px;left:12px;}
  .brand__text{align-items:flex-start;}
  .brand__name{font-size:14px;}
  .brand__sub{font-size:9.5px;}

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 12px;
    background:transparent;
    border:1px solid var(--line);
    border-radius:2px;
    color:var(--white);
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:.1em;
    cursor:pointer;
    transition:border-color .18s var(--ease),color .18s var(--ease);
  }
  .nav-toggle:hover,.nav-toggle:focus-visible{
    border-color:var(--cyan);
    color:var(--cyan);
  }
  .nav-toggle__bars{
    display:inline-flex;
    flex-direction:column;
    gap:3px;
    width:16px;
  }
  .nav-toggle__bars i{
    display:block;
    height:2px;
    width:100%;
    background:currentColor;
    transition:transform .18s var(--ease);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{
    transform:translateY(2.5px) rotate(45deg);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{
    transform:translateY(-2.5px) rotate(-45deg);
  }

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    gap:12px;
    padding:14px 16px 18px;
    background:var(--ink);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .site-nav[data-open]{display:flex;}
  .site-nav__list{
    flex-direction:row;
    flex-wrap:nowrap;
    gap:8px;
    overflow-x:auto;
    padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .site-nav__item{flex:0 0 auto;}
  .site-nav__link{
    padding:8px 12px;
    font-size:13px;
    letter-spacing:.04em;
    white-space:nowrap;
    border:1px solid var(--line);
    color:var(--muted);
  }
  .site-nav__link::before{display:none;}
  .site-nav__link[aria-current="page"]{
    border-color:var(--cyan);
    color:var(--cyan);
    background:rgba(37,225,214,.10);
  }
  .site-header__actions{
    flex-direction:row;
    margin-top:0;
  }
  .site-header__actions .btn{
    flex:1 1 0;
    width:auto;
    font-size:13px;
    padding:10px 8px;
    letter-spacing:.06em;
  }
}

@media (max-width:900px){
  .site-footer__top{grid-template-columns:minmax(0,1fr);}
  .grid--asym{grid-template-columns:minmax(0,1fr);}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:720px){
  .grid--2{grid-template-columns:minmax(0,1fr);}
  .grid--3{grid-template-columns:minmax(0,1fr);}
  .panel--stack{
    box-shadow:
      6px 6px 0 -1px var(--ink),
      6px 6px 0 0 var(--line),
      var(--shadow);
  }
}

@media (max-width:560px){
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));}
  .site-footer__legal{flex-direction:column;align-items:flex-start;}
}

@media (hover:none){
  .steps__desc{max-height:120px;opacity:1;}
}

/* =========================================================
   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;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none;}
  .steps__desc{max-height:120px;opacity:1;}
  .btn:hover,.btn:focus-visible{transform:none;}
  .steps__item:hover,.steps__item:focus-within{transform:none;}
}