/* ============================================================
   V8国际娱乐 — 全站共享样式 / assets/site.css
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}

/* ---------- tokens ---------- */
:root{
  --ink:#07080A;
  --panel:#0E1116;
  --panel-2:#171B22;
  --line:#2B323D;
  --line-soft:rgba(43,50,61,.55);
  --silver:#B8C0CC;
  --dim:#6C7684;
  --paper:#F4F6F8;
  --amber:#F0A43A;
  --cyan:#35D6E6;
  --amber-deep:#6E4C1F;
  --cyan-deep:#0B3A40;

  --rail:248px;
  --gap:clamp(16px,1.8vw,26px);
  --pad:clamp(18px,3vw,40px);
  --r:16px;

  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-cond:"Oswald","Arial Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- base ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(880px 520px at 16% -12%,rgba(53,214,230,.075),transparent 70%),
    radial-gradient(760px 480px at 98% 6%,rgba(240,164,58,.065),transparent 72%);
  background-attachment:fixed;
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-cond);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--paper);
}
h1{font-size:clamp(2.1rem,4.4vw,3.8rem)}
h2{font-size:clamp(1.55rem,2.5vw,2.35rem)}
h3{font-size:clamp(1.12rem,1.5vw,1.4rem)}
h4{font-size:1rem;letter-spacing:0}

p{color:var(--silver)}

::selection{background:rgba(53,214,230,.28);color:var(--paper)}

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

/* ---------- layout helpers ---------- */
.wrap{
  width:min(1180px,calc(100% - 2 * var(--pad)));
  margin-inline:auto;
}
.section{padding-block:clamp(34px,5vw,68px)}

.grid{display:grid;gap:var(--gap)}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--halves{grid-template-columns:1fr 1fr}

@media (max-width:900px){
  .grid--7-5,.grid--8-4,.grid--5-7,.grid--halves{grid-template-columns:1fr}
}

/* ---------- typography helpers ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.muted{color:var(--silver)}
.accent-amber{color:var(--amber)}
.accent-cyan{color:var(--cyan)}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--amber);font-weight:500;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.85}
.eyebrow--cyan{color:var(--cyan)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.8em 1.55em;border-radius:999px;
  border:1px solid var(--line);
  font-family:var(--font-body);font-weight:700;font-size:.94rem;line-height:1.25;
  color:var(--paper);background:var(--panel-2);
  transition:background .25s ease,border-color .25s ease,color .25s ease,box-shadow .25s ease;
}
.btn--amber{
  color:#0B0A05;
  background:linear-gradient(180deg,#F7BE6B 0%,#F0A43A 55%,#DE9028 100%);
  border-color:rgba(240,164,58,.6);
  box-shadow:0 10px 26px rgba(240,164,58,.16);
}
.btn--amber:hover{box-shadow:0 14px 34px rgba(240,164,58,.26);border-color:rgba(247,190,107,.9)}
.btn--cyan{
  color:#04191C;
  background:linear-gradient(180deg,#6FE6F1 0%,#35D6E6 55%,#23BBCB 100%);
  border-color:rgba(53,214,230,.55);
  box-shadow:0 10px 26px rgba(53,214,230,.16);
}
.btn--cyan:hover{box-shadow:0 14px 34px rgba(53,214,230,.26)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn--ghost:hover{background:rgba(43,50,61,.45);border-color:#3E4756}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;box-shadow:0 0 0 6px rgba(53,214,230,.18)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.32em .78em;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(23,27,34,.75);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--silver);text-transform:uppercase;line-height:1.5;
}
.tag--amber{color:var(--amber);border-color:rgba(240,164,58,.45);background:rgba(110,76,31,.24)}
.tag--cyan{color:var(--cyan);border-color:rgba(53,214,230,.4);background:rgba(11,58,64,.34)}

/* ---------- panels ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(165deg,var(--panel-2) 0%,var(--panel) 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.panel--cut{border-radius:var(--r) var(--r) var(--r) 4px}
.panel:hover{
  border-color:#3A4350;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 20px 44px rgba(0,0,0,.34);
}

.rule-band{
  padding:clamp(16px,2.4vw,26px) clamp(18px,3vw,34px);
  border:1px solid var(--line);
  border-radius:var(--r) var(--r) var(--r) 4px;
  background:
    linear-gradient(90deg,rgba(240,164,58,.11) 0%,rgba(53,214,230,.09) 100%),
    var(--panel);
}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;
  display:grid;place-items:center;
  overflow:hidden;
  width:100%;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--r) var(--r) var(--r) 4px;
  background:
    radial-gradient(120% 120% at 18% 0%,rgba(53,214,230,.12),transparent 56%),
    radial-gradient(100% 100% at 92% 100%,rgba(240,164,58,.12),transparent 60%),
    var(--panel-2);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.035) 0 1px,transparent 1px 18px);
  mix-blend-mode:screen;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:4 / 5}
.media-caption{
  margin-top:.7em;
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.04em;
  color:var(--dim);
}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:clamp(14px,2vw,22px)}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.05em;color:var(--dim);
}
.breadcrumb-item + .breadcrumb-item::before{content:"/";margin-right:8px;color:#39424F}
.breadcrumb-link{color:var(--silver);transition:color .2s ease}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-item[aria-current="page"]{color:var(--paper)}

/* ---------- prose ---------- */
.prose{max-width:72ch}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:2.1em}
.prose h3{margin-top:1.7em}
.prose p{color:var(--silver)}
.prose strong{color:var(--paper);font-weight:700}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,214,230,.35)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul li,.prose ol li{
  position:relative;padding-left:1.15em;margin-top:.45em;color:var(--silver);
}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.85em;
  width:7px;height:1px;background:var(--amber);
}
.prose ol{counter-reset:prose}
.prose ol li{counter-increment:prose}
.prose ol li::before{
  content:counter(prose) ".";
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:.78em;color:var(--amber);
}
.prose blockquote{
  padding:.9em 1.2em;border-left:2px solid var(--amber);
  background:rgba(23,27,34,.7);border-radius:0 var(--r) var(--r) 0;
}

/* ============================================================
   HEADER — 左侧悬浮胶囊轨道
   ============================================================ */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:400;
  padding:.72em 1.15em;border-radius:999px;
  background:var(--cyan);color:#04191C;
  font-weight:700;font-size:.86rem;line-height:1.2;
  transform:translateY(-180%);
  transition:transform .22s ease;
}
.skip-link:focus-visible{transform:translateY(0);outline:2px solid #FFFFFF;outline-offset:2px}

.site-header{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail);
  z-index:60;
  padding:12px;
  pointer-events:none;
}

.rail{
  pointer-events:auto;
  display:flex;
  flex-direction:column;
  gap:16px;
  height:100%;
  padding:18px 14px;
  overflow-y:auto;
  overscroll-behavior:contain;
  border:1px solid var(--line);
  border-radius:24px 24px 24px 6px;
  background:linear-gradient(180deg,rgba(14,17,22,.95) 0%,rgba(7,8,10,.94) 100%);
  box-shadow:0 24px 64px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.045);
  backdrop-filter:blur(14px);
}

.brand{
  display:flex;align-items:center;gap:11px;
  padding:2px 2px 15px;
  border-bottom:1px solid var(--line-soft);
}
.brand-mark{
  flex:0 0 auto;
  display:grid;place-items:center;
  width:42px;height:42px;
  border-radius:12px 12px 12px 3px;
  font-family:var(--font-mono);font-weight:700;font-size:1.02rem;letter-spacing:.02em;
  color:#0B0A05;
  background:linear-gradient(160deg,#F7BE6B 0%,#F0A43A 58%,#DE9028 100%);
  box-shadow:0 0 0 1px rgba(240,164,58,.38),0 10px 22px rgba(240,164,58,.2);
}
.brand-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand-name{
  font-family:var(--font-cond);font-weight:900;font-size:1rem;
  letter-spacing:.005em;line-height:1.2;color:var(--paper);
}
.brand-sub{font-size:.67rem;line-height:1.5;color:var(--dim);letter-spacing:.02em}

.nav-toggle{display:none}

.site-nav{display:block}
.nav-caption{
  margin:0 0 10px 8px;
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.2em;
  text-transform:uppercase;color:#5B6472;
}
.nav-list{display:flex;flex-direction:column;gap:3px}
.nav-link{
  position:relative;
  display:block;
  padding:.6em .9em .6em 1.1em;
  border:1px solid transparent;
  border-radius:12px;
  font-size:.88rem;font-weight:500;line-height:1.45;
  color:var(--silver);
  transition:color .22s ease,background .22s ease,border-color .22s ease;
}
.nav-link::before{
  content:"";position:absolute;left:3px;top:50%;
  width:3px;height:0;border-radius:2px;
  background:var(--amber);
  transform:translateY(-50%);
  transition:height .24s ease;
}
.nav-link:hover{color:var(--paper);background:rgba(43,50,61,.4);border-color:var(--line-soft)}
.nav-link:hover::before{height:52%}
.nav-link:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;color:var(--paper)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  border-color:rgba(240,164,58,.4);
  background:linear-gradient(90deg,rgba(240,164,58,.17) 0%,rgba(240,164,58,.02) 100%);
}
.nav-link[aria-current="page"]::before{height:calc(100% - 18px);background:var(--amber)}

.rail-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
  display:flex;flex-direction:column;gap:8px;
}
.rail-login{
  display:flex;align-items:center;justify-content:center;gap:.5em;
  padding:.64em 1em;border-radius:999px;
  font-size:.86rem;font-weight:700;line-height:1.2;
  color:#04191C;
  background:linear-gradient(180deg,#6FE6F1 0%,#35D6E6 60%,#23BBCB 100%);
  box-shadow:0 0 0 1px rgba(53,214,230,.4),0 10px 24px rgba(53,214,230,.18);
  transition:box-shadow .25s ease,filter .25s ease;
}
.rail-login:hover{box-shadow:0 0 0 1px rgba(111,230,241,.7),0 14px 30px rgba(53,214,230,.28)}
.rail-login:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;box-shadow:0 0 0 6px rgba(53,214,230,.18)}
.rail-login-dot{
  width:7px;height:7px;border-radius:50%;
  background:#04191C;box-shadow:0 0 0 3px rgba(4,25,28,.22);
}
.rail-note{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.1em;
  text-align:center;color:#5B6472;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(52px,7vw,104px);
  padding-top:clamp(38px,5.5vw,68px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel) 0%,#08090B 100%);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent 0%,rgba(240,164,58,.65) 38%,rgba(53,214,230,.65) 68%,transparent 100%);
  opacity:.55;
}
.footer-wrap{
  width:min(1180px,calc(100% - 2 * var(--pad)));
  margin-inline:auto;
}

.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.15fr;
  gap:var(--gap);
  padding-bottom:clamp(26px,4vw,44px);
}

.footer-brand-link{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-mark{
  display:grid;place-items:center;
  width:34px;height:34px;border-radius:10px 10px 10px 3px;
  font-family:var(--font-mono);font-weight:700;font-size:.86rem;
  color:#0B0A05;
  background:linear-gradient(160deg,#F7BE6B,#F0A43A 60%,#DE9028);
  box-shadow:0 0 0 1px rgba(240,164,58,.35);
}
.footer-brand-name{
  font-family:var(--font-cond);font-weight:900;font-size:1.02rem;
  letter-spacing:.005em;color:var(--paper);
}
.footer-summary{
  max-width:34ch;margin-bottom:18px;
  font-size:.88rem;line-height:1.8;color:var(--silver);
}
.footer-cta{margin-top:2px}

.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);font-size:.65rem;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:#5B6472;
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{
  position:relative;
  font-size:.88rem;line-height:1.6;color:var(--silver);
  transition:color .2s ease,padding-left .2s ease;
}
.footer-link::before{
  content:"";position:absolute;left:0;top:50%;
  width:0;height:1px;background:var(--amber);
  transform:translateY(-50%);
  transition:width .2s ease;
}
.footer-link:hover{color:var(--paper);padding-left:14px}
.footer-link:hover::before{width:9px}
.footer-link:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

.contact-list{display:flex;flex-direction:column;gap:12px}
.contact-line{display:flex;flex-direction:column;gap:1px}
.contact-key{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;
  text-transform:uppercase;color:#5B6472;
}
.contact-value{
  font-size:.86rem;line-height:1.6;color:var(--paper);
  overflow-wrap:anywhere;
}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px;
  padding-block:20px 26px;
  border-top:1px solid var(--line-soft);
}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.legal-link{
  font-size:.82rem;color:var(--silver);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.legal-link:hover{color:var(--cyan);border-bottom-color:rgba(53,214,230,.6)}
.legal-link:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
.footer-icp{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.03em;
  color:#5B6472;
}

/* ============================================================
   SCROLL METER (JS 注入)
   ============================================================ */
.scroll-meter{
  position:fixed;top:0;left:0;
  width:100%;height:2px;
  z-index:300;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber) 0%,#F0A43A 45%,var(--cyan) 100%);
  box-shadow:0 0 10px rgba(53,214,230,.35);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (min-width:1120px){
  body{padding-left:var(--rail)}
  .scroll-meter{left:var(--rail);width:calc(100% - var(--rail))}
}

@media (max-width:1119px){
  body{padding-top:84px}

  .site-header{
    inset:0 0 auto 0;
    width:auto;
    padding:10px 14px;
  }
  .rail{
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    height:auto;
    padding:10px 12px;
    overflow:visible;
    border-radius:18px 18px 18px 6px;
  }
  .brand{
    flex:1 1 auto;
    gap:9px;
    padding:0;
    border-bottom:0;
    order:1;
  }
  .brand-mark{width:36px;height:36px;border-radius:10px 10px 10px 3px;font-size:.9rem}
  .brand-name{font-size:.94rem}
  .brand-sub{display:none}

  .nav-toggle{
    display:inline-flex;align-items:center;gap:.55em;
    order:3;
    padding:.5em .85em;
    border:1px solid var(--line);
    border-radius:999px;
    background:var(--panel-2);
    font-size:.8rem;font-weight:700;color:var(--paper);
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-toggle:hover{border-color:#3E4756;background:#1C212A}
  .nav-toggle:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
  .nav-toggle-label{letter-spacing:.06em}
  .nav-toggle-icon{position:relative;display:inline-block;width:16px;height:10px}
  .nav-toggle-icon::before,
  .nav-toggle-icon::after{
    content:"";position:absolute;left:0;
    width:100%;height:1.5px;border-radius:2px;
    background:currentColor;
    transition:transform .22s ease,top .22s ease;
  }
  .nav-toggle-icon::before{top:0}
  .nav-toggle-icon::after{top:8.5px}
  .site-header[data-open] .nav-toggle-icon::before{top:4.25px;transform:rotate(45deg)}
  .site-header[data-open] .nav-toggle-icon::after{top:4.25px;transform:rotate(-45deg)}

  .rail-foot{
    order:2;
    margin:0;
    padding:0;
    border:0;
    flex-direction:row;
    align-items:center;
  }
  .rail-login{padding:.5em .9em;font-size:.8rem}
  .rail-note{display:none}

  .site-nav{
    order:5;
    flex-basis:100%;
    display:none;
    padding-top:10px;
    margin-top:2px;
    border-top:1px solid var(--line-soft);
  }
  .site-header[data-open] .site-nav{display:block}
  .nav-caption{display:none}
  .nav-list{gap:2px}
  .nav-link{padding:.68em .9em .68em 1.1em;font-size:.9rem}
  .nav-link::before{left:3px}
  .nav-link[aria-current="page"]::before{height:calc(100% - 20px)}

  .footer-top{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:639px){
  body{padding-top:78px}
  .site-header{padding:8px 10px}
  .rail{padding:9px 10px;gap:8px}
  .brand-mark{width:32px;height:32px;font-size:.82rem}
  .brand-name{font-size:.88rem}
  .nav-toggle{padding:.46em .72em;font-size:.76rem}

  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-legal{gap:16px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}