/* ==========================================================================
   MG游戏站 — /assets/site.css
   共享外壳样式：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

:root{
  --bg:#050A24;
  --bg-2:#0B1338;
  --bg-3:#131C4D;
  --line:#1E2A6B;
  --cyan:#35F2E0;
  --violet:#8A5BFF;
  --amber:#FFA63D;
  --ok:#4DE38A;
  --text:#E9EDFF;
  --muted:#9AA6D4;
  --dim:#6170AB;

  --rail-w:84px;
  --wrap-max:1200px;
  --radius:2px;

  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --ease:cubic-bezier(.4,.7,.2,1);
}

/* --------------------------------------------------------------------------
   1. Reset
   -------------------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  min-height:100%;
  background-color:var(--bg);
  background-image:
    linear-gradient(90deg, rgba(30,42,107,.30) 1px, transparent 1px),
    radial-gradient(760px 440px at 86% 0%, rgba(138,91,255,.15), transparent 70%),
    radial-gradient(620px 380px at 0% 0%, rgba(53,242,224,.08), transparent 72%);
  background-size:88px auto, auto, auto;
  background-position:center top, right -80px top -100px, left -140px top -60px;
  background-repeat:repeat, no-repeat, no-repeat;
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

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

button,input,select,textarea{font:inherit;color:inherit;}

ul,ol{margin:0;padding:0;}

a{
  color:var(--cyan);
  text-decoration:none;
  transition:color .18s var(--ease);
}

a:hover{color:#7DF7EC;}

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

::selection{background:rgba(53,242,224,.28);color:#fff;}

/* --------------------------------------------------------------------------
   2. 中文排版
   -------------------------------------------------------------------------- */
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  color:var(--text);
}

p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}

strong{font-weight:700;color:#fff;}

code,kbd,samp{font-family:var(--mono);font-size:.9em;}

hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* --------------------------------------------------------------------------
   3. 容器与节奏
   -------------------------------------------------------------------------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}

.section{padding:72px 0;}

.stack{display:flex;flex-direction:column;gap:16px;}

#main-content{display:block;scroll-margin-top:130px;}

/* --------------------------------------------------------------------------
   4. 展签式排版元素
   -------------------------------------------------------------------------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  margin:0 0 12px;
}

.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:currentColor;
  flex:0 0 18px;
}

.section-title{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:700;
  letter-spacing:-.015em;
  line-height:1.3;
  margin:0 0 14px;
}

.lead{
  font-size:17px;
  color:var(--muted);
  max-width:62ch;
}

.frame{
  position:relative;
  border:1px solid var(--line);
  background:rgba(11,19,56,.55);
  border-radius:var(--radius);
}

.frame::before,
.frame::after{
  content:"";
  position:absolute;
  width:14px;
  height:14px;
  border:1px solid var(--cyan);
  pointer-events:none;
}

.frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0;}
.frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0;}

.card{
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}

.card:hover{
  border-color:rgba(53,242,224,.45);
  transform:translateY(-2px);
  box-shadow:0 10px 30px -18px rgba(53,242,224,.55);
}

/* --------------------------------------------------------------------------
   5. 图片容器（页面阶段放 <img> 用）
   -------------------------------------------------------------------------- */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--radius);
  aspect-ratio:16 / 9;
}

.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.media--tall{aspect-ratio:4 / 5;}
.media--square{aspect-ratio:1 / 1;}
.media--wide{aspect-ratio:21 / 9;}

.media--slanted{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%);
}

/* --------------------------------------------------------------------------
   6. 按钮
   -------------------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.4;
  cursor:pointer;
  text-align:center;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}

.btn:hover{transform:translateY(-1px);}

.btn--primary{background:linear-gradient(135deg,var(--cyan),#1FD6C6);color:#04122A;}
.btn--primary:hover{background:linear-gradient(135deg,#5DF6E8,#33E6D5);color:#04122A;}

.btn--ghost{background:transparent;border-color:var(--line);color:var(--text);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}

.btn--amber{background:linear-gradient(135deg,var(--amber),#FF8A1F);color:#1A0E00;}
.btn--amber:hover{background:linear-gradient(135deg,#FFB65E,#FF9C36);color:#1A0E00;}

/* --------------------------------------------------------------------------
   7. 面包屑
   -------------------------------------------------------------------------- */
.breadcrumb{
  padding:20px 0 0;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--dim);
}

.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  list-style:none;
}

.breadcrumb li{display:inline-flex;align-items:center;}

.breadcrumb li::after{
  content:"/";
  margin:0 8px;
  color:var(--line);
}

.breadcrumb li:last-child::after{display:none;}

.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--text);}

/* --------------------------------------------------------------------------
   8. 跳过链接
   -------------------------------------------------------------------------- */
.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:#04122A;
  font-weight:700;
  font-size:14px;
  border-radius:0 0 var(--radius) 0;
}

.skip-link:focus{
  left:0;
  color:#04122A;
  outline-offset:0;
}

/* --------------------------------------------------------------------------
   9. 页头
   -------------------------------------------------------------------------- */
.site-header{
  position:relative;
  z-index:60;
  background:rgba(5,10,36,.96);
  border-bottom:1px solid var(--line);
}

/* 上层：品牌轨道 */
.rail{
  background:linear-gradient(90deg,#070D2C 0%,var(--bg-2) 42%,#070D2C 100%);
  border-bottom:1px solid rgba(30,42,107,.75);
}

.rail__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:50px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  flex:0 0 auto;
}

.brand:hover{color:var(--text);}

.brand__glyph{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:0 0 34px;
  border:1px solid rgba(53,242,224,.6);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  background:
    linear-gradient(180deg,rgba(53,242,224,.12),transparent),
    rgba(53,242,224,.04);
}

.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.3;
}

.brand__name{
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--text);
}

.brand__sub{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--dim);
  text-transform:uppercase;
}

.rail__status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}

.rail__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(77,227,138,.16);
  animation:railPulse 2.6s var(--ease) infinite;
}

@keyframes railPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(77,227,138,.16);}
  50%{box-shadow:0 0 0 6px rgba(77,227,138,.05);}
}

.rail__cta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border:1px solid rgba(53,242,224,.42);
  background:rgba(53,242,224,.06);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.12em;
  white-space:nowrap;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}

.rail__cta::after{content:"→";font-size:12px;}

.rail__cta:hover{
  background:rgba(53,242,224,.14);
  border-color:var(--cyan);
  color:#7DF7EC;
}

/* 下层：栏目甲板 */
.deck{
  position:relative;
  background:rgba(5,10,36,.92);
}

.deck__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  min-height:58px;
}

.site-nav{margin-right:auto;}

.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
}

.site-nav__list a{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  color:var(--muted);
  font-size:14.5px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
}

.site-nav__list a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:1px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease),background-color .2s var(--ease),box-shadow .2s var(--ease);
}

.site-nav__list a:hover{color:var(--text);}
.site-nav__list a:hover::after{transform:scaleX(1);background:rgba(53,242,224,.45);}

.site-nav__list a[aria-current="page"]{color:var(--text);}
.site-nav__list a[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,242,224,.75);
}

.deck__cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 20px;
  background:linear-gradient(135deg,var(--amber),#FF8A1F);
  color:#1A0E00;
  font-size:14px;
  font-weight:700;
  letter-spacing:.03em;
  white-space:nowrap;
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  transition:filter .2s var(--ease),transform .2s var(--ease);
}

.deck__cta:hover{
  color:#1A0E00;
  filter:brightness(1.08);
  transform:translateY(-1px);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--text);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}

.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .22s var(--ease);
}

.nav-toggle__bars::before{top:-5px;}
.nav-toggle__bars::after{top:5px;}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg);}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet),var(--amber));
  pointer-events:none;
  z-index:2;
}

/* --------------------------------------------------------------------------
   10. 页脚
   -------------------------------------------------------------------------- */
.site-footer{
  position:relative;
  margin-top:80px;
  background:linear-gradient(180deg,#050A24 0%,#070D2C 100%);
  border-top:1px solid var(--line);
}

.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:200px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet),transparent);
}

.site-footer p{margin:0;}

.footer__grid{
  display:grid;
  grid-template-columns:minmax(240px,1.5fr) minmax(220px,1fr) minmax(260px,1.25fr);
  gap:48px;
  padding-top:64px;
  padding-bottom:52px;
}

.footer__col{min-width:0;}

.footer__desc{
  margin-top:16px;
  max-width:36ch;
  color:var(--muted);
  font-size:14px;
  line-height:1.85;
}

.footer__title{
  position:relative;
  margin:0 0 18px;
  font-family:var(--mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}

.footer__title::before{
  content:"";
  display:inline-block;
  width:14px;
  height:1px;
  margin-right:8px;
  vertical-align:middle;
  background:var(--cyan);
}

.footer__list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
}

.footer__list--split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2px 22px;
}

.footer__list a{
  display:inline-block;
  padding:5px 0;
  color:var(--muted);
  font-size:14.5px;
  transition:color .18s var(--ease),transform .18s var(--ease);
}

.footer__list a:hover{
  color:var(--cyan);
  transform:translateX(3px);
}

.footer__contact{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.footer__contact li{
  display:grid;
  grid-template-columns:58px minmax(0,1fr);
  gap:10px;
  align-items:start;
}

.footer__key{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--dim);
  padding-top:5px;
  text-transform:uppercase;
}

.footer__val{
  color:var(--muted);
  font-size:14.5px;
  line-height:1.7;
  word-break:break-word;
}

.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-top:20px;
  padding-bottom:30px;
  border-top:1px solid rgba(30,42,107,.75);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--dim);
}

.footer__copy{color:var(--dim);}

.footer__icp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
}

.footer__icp::before{
  content:"";
  width:6px;
  height:6px;
  background:rgba(255,166,61,.85);
  flex:0 0 6px;
}

/* --------------------------------------------------------------------------
   11. 返回顶部 & 滚动显现
   -------------------------------------------------------------------------- */
.to-top{
  position:fixed;
  right:20px;
  bottom:22px;
  z-index:80;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  padding:0;
  background:rgba(11,19,56,.94);
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}

.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}

.to-top:hover{
  border-color:var(--cyan);
  background:rgba(53,242,224,.12);
}

[data-reveal-ready]{
  opacity:0;
  transform:translateY(16px);
}

[data-reveal-ready].is-visible{
  opacity:1;
  transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* --------------------------------------------------------------------------
   12. 响应式
   -------------------------------------------------------------------------- */
@media (min-width:901px){
  .site-header{
    position:sticky;
    top:0;
  }
}

@media (max-width:1024px){
  .footer__grid{
    grid-template-columns:minmax(220px,1.4fr) minmax(200px,1fr) minmax(220px,1.2fr);
    gap:40px 32px;
  }
}

@media (max-width:900px){
  .section{padding:56px 0;}

  .rail__status{display:none;}

  .nav-toggle{display:inline-flex;}

  .deck__cta{
    padding:9px 15px;
    font-size:13px;
    clip-path:polygon(7px 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%,0 7px);
  }

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin:0;
    background:#0B1338;
    border:1px solid var(--line);
    border-top:0;
    box-shadow:0 22px 44px -26px rgba(0,0,0,.9);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height .24s var(--ease),visibility .24s var(--ease);
  }

  .site-nav[data-open]{
    max-height:520px;
    visibility:visible;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0;
  }

  .site-nav__list a{
    padding:13px 20px;
    font-size:16px;
    border-bottom:1px solid rgba(30,42,107,.55);
  }

  .site-nav__list li:last-child a{border-bottom:0;}

  .site-nav__list a::after{display:none;}

  .site-nav__list a[aria-current="page"]{
    color:var(--cyan);
    background:rgba(53,242,224,.08);
    box-shadow:inset 3px 0 0 var(--cyan);
  }

  .footer__grid{
    grid-template-columns:1fr 1fr;
    gap:36px 28px;
    padding-top:52px;
    padding-bottom:40px;
  }

  .footer__brand{grid-column:1 / -1;}
}

@media (max-width:560px){
  .wrap{padding-left:18px;padding-right:18px;}

  .section{padding:44px 0;}

  .brand__sub{display:none;}

  .rail__cta{padding:5px 10px;font-size:11px;}

  .footer__grid{grid-template-columns:1fr;gap:32px;}

  .footer__list--split{grid-template-columns:1fr 1fr;}

  .footer__bottom{
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
  }

  .to-top{right:14px;bottom:16px;width:42px;height:42px;}
}

/* --------------------------------------------------------------------------
   13. 减少动效
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}

  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }

  [data-reveal-ready]{
    opacity:1;
    transform:none;
  }

  .to-top{
    opacity:1;
    visibility:visible;
    transform:none;
  }
}