/* ============================================================
   99真人在线 · 共享样式表 /assets/site.css
   夜航控制台：墨水黑底 + 蓝图网格 + 电光青/暖橙状态色
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
img,svg{max-width:100%;display:block;}
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;cursor:pointer;}
table{border-collapse:collapse;}

/* ---------- design tokens ---------- */
:root{
  --ink:#0A0E12;
  --ink-2:#121922;
  --line:#2A3644;
  --silver:#C6CDD6;
  --white:#F2F5F8;
  --cyan:#19E6D0;
  --orange:#FF7A2F;
  --violet:#6F5BFF;
  --amber:#FFC24B;
  --green:#3DD68C;
  --muted:#67788C;
  --cyan-soft:rgba(25,230,208,.10);
  --cyan-edge:rgba(25,230,208,.45);
  --orange-edge:rgba(255,122,47,.45);
  --violet-edge:rgba(111,91,255,.45);
  --amber-edge:rgba(255,194,75,.45);
  --shadow-hard:8px 8px 0 rgba(0,0,0,.42);
  --font-sans:"MiSans","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans CJK SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --maxw:1280px;
  --pad-x:clamp(1rem,4vw,2.5rem);
  --header-h:76px;
}

/* ---------- base typography ---------- */
body{
  background:var(--ink);
  color:var(--silver);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.18;
}
main,.site-main{position:relative;z-index:1;}
h1,h2,h3,h4{color:var(--white);font-weight:800;letter-spacing:-.02em;line-height:1.22;}
h1{font-size:clamp(2.1rem,5.2vw,3.5rem);}
h2{font-size:clamp(1.6rem,3.6vw,2.5rem);}
h3{font-size:clamp(1.15rem,2.2vw,1.4rem);}
p{max-width:70ch;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px;}

/* ---------- layout primitives ---------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.section{padding-block:clamp(2.5rem,6vw,4.5rem);}
.divider{height:1px;border:0;background:var(--line);margin:clamp(1.5rem,4vw,2.5rem) 0;}
.mono{font-family:var(--font-mono);letter-spacing:.04em;}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2.5vw,2rem);
}
.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

/* ---------- text helpers ---------- */
.kicker{
  display:flex;
  align-items:center;
  gap:.65rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--cyan);
  margin-bottom:.9rem;
}
.kicker::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--cyan);
  flex:0 0 auto;
}
.section-title{font-size:clamp(1.35rem,2.8vw,1.95rem);color:var(--white);letter-spacing:-.02em;}
.lede{font-size:1.05rem;color:var(--silver);max-width:64ch;}
.prose{font-size:16px;line-height:1.75;}
.prose p + p{margin-top:1.2em;}
.prose h3{margin:1.8em 0 .6em;}
.prose strong{color:var(--white);}
.prose ul{margin:1em 0;}
.prose ul li{padding-left:1.1rem;position:relative;}
.prose ul li + li{margin-top:.4em;}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;background:var(--cyan);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.68rem 1.15rem;
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.08em;
  border:1px solid var(--line);
  background:var(--ink-2);
  color:var(--white);
  box-shadow:4px 4px 0 rgba(0,0,0,.35);
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(0,0,0,.42);}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink);box-shadow:4px 4px 0 rgba(25,230,208,.22);}
.btn--primary:hover{box-shadow:6px 6px 0 rgba(25,230,208,.3);}
.btn--ghost{background:transparent;border-color:var(--cyan);color:var(--cyan);box-shadow:4px 4px 0 rgba(25,230,208,.14);}
.btn--warn{background:var(--orange);border-color:var(--orange);color:var(--ink);box-shadow:4px 4px 0 rgba(255,122,47,.22);}

/* ---------- panels & cards ---------- */
.panel{
  background:var(--ink-2);
  border:1px solid var(--line);
  box-shadow:var(--shadow-hard);
  padding:clamp(1.25rem,3vw,2rem);
}
.panel--accent{border-left:3px solid var(--cyan);}
.panel--warn{border-left:3px solid var(--orange);}
.card{
  background:var(--ink-2);
  border:1px solid var(--line);
  padding:clamp(1rem,2.4vw,1.5rem);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.card:hover{border-color:var(--cyan-edge);transform:translateY(-2px);box-shadow:0 10px 0 rgba(25,230,208,.12);}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35em;
  padding:.22rem .55rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  border:1px solid var(--line);
  color:var(--silver);
  background:rgba(18,25,34,.7);
}
.tag--cyan{color:var(--cyan);border-color:var(--cyan-edge);background:var(--cyan-soft);}
.tag--orange{color:var(--orange);border-color:var(--orange-edge);background:rgba(255,122,47,.1);}
.tag--violet{color:#A79BFF;border-color:var(--violet-edge);background:rgba(111,91,255,.12);}
.tag--amber{color:var(--amber);border-color:var(--amber-edge);background:rgba(255,194,75,.1);}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  color:var(--muted);
  padding-block:1rem;
}
.breadcrumb li{display:flex;align-items:center;gap:.5rem;}
.breadcrumb li + li::before{content:"/";color:var(--line);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--silver);}

/* ---------- tabs ---------- */
.tabs{position:relative;}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem;
  padding-bottom:.6rem;
  border-bottom:1px solid var(--line);
}
.tabs__tab{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.07em;
  padding:.5rem .9rem;
  border:1px solid var(--line);
  color:var(--silver);
  background:transparent;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.tabs__tab:hover{border-color:var(--cyan-edge);color:var(--white);}
.tabs__tab[aria-selected="true"]{background:var(--cyan);border-color:var(--cyan);color:var(--ink);}
.tabs__panel{margin-top:1.4rem;}
.tabs__panel[hidden]{display:none;}
.tabs__panel.is-entering{animation:tabIn .18s ease both;}
@keyframes tabIn{from{opacity:0;transform:translateX(14px);}to{opacity:1;transform:none;}}

/* ---------- checklist ---------- */
.checklist{border-top:1px solid var(--line);}
.checklist__item{
  display:flex;
  gap:.85rem;
  width:100%;
  text-align:left;
  padding:.75rem .2rem;
  border-bottom:1px solid var(--line);
  color:var(--silver);
  font-size:.96rem;
  line-height:1.65;
  transition:color .16s ease,background .16s ease;
}
.checklist__item:hover{background:rgba(25,230,208,.05);}
.checklist__box{
  position:relative;
  flex:0 0 18px;
  width:18px;
  height:18px;
  margin-top:.4em;
  border:1px solid var(--line);
  background:var(--ink);
  transition:border-color .12s ease,background .12s ease;
}
.checklist__box::after{
  content:"";
  position:absolute;
  left:5px;
  top:1px;
  width:5px;
  height:10px;
  border-right:2px solid var(--green);
  border-bottom:2px solid var(--green);
  transform:rotate(40deg) scale(.4);
  opacity:0;
  transform-origin:center;
  transition:transform .12s ease,opacity .12s ease;
}
.checklist__item[aria-pressed="true"] .checklist__box{border-color:var(--green);background:rgba(61,214,140,.12);}
.checklist__item[aria-pressed="true"] .checklist__box::after{opacity:1;transform:rotate(40deg) scale(1);}
.checklist__item[aria-pressed="true"] .checklist__text{color:var(--white);}
.checklist__text{flex:1 1 auto;}

/* ---------- data table ---------- */
.data-table{width:100%;font-size:.92rem;border:1px solid var(--line);}
.data-table th,.data-table td{border:1px solid var(--line);padding:.62rem .8rem;text-align:left;vertical-align:top;}
.data-table thead th{
  background:var(--ink-2);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  font-weight:500;
}
.data-table tbody tr:nth-child(even){background:rgba(18,25,34,.6);}

/* ---------- media frame ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  background:
    linear-gradient(135deg,var(--ink-2) 0%,#0C131A 100%);
  aspect-ratio:16 / 9;
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,transparent 58%,rgba(10,14,18,.55) 100%);
}
.media-frame--4x3{aspect-ratio:4 / 3;}
.media-frame--1x1{aspect-ratio:1 / 1;}
.media-frame--21x9{aspect-ratio:21 / 9;}
.media-frame--plain::after{display:none;}

/* ---------- index rail ---------- */
.index-rail{position:sticky;top:calc(var(--header-h) + 1.25rem);align-self:start;}
.index-rail__item{
  display:flex;
  align-items:baseline;
  gap:.7rem;
  padding:.6rem 0;
  border-bottom:1px solid var(--line);
  color:var(--muted);
  font-size:.92rem;
  transition:color .18s ease,border-color .18s ease;
}
.index-rail__num{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--line);
  transition:color .18s ease;
}
.index-rail__item:hover,.index-rail__item[aria-current="true"]{color:var(--white);border-bottom-color:var(--cyan-edge);}
.index-rail__item:hover .index-rail__num,.index-rail__item[aria-current="true"] .index-rail__num{color:var(--cyan);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  left:1rem;
  top:-5rem;
  z-index:200;
  padding:.6rem 1rem;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.08em;
  transition:top .15s ease;
}
.skip-link:focus{top:.75rem;}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  --header-h:76px;
  background:rgba(10,14,18,.9);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background .2s ease,border-color .2s ease;
}
.site-header[data-condensed]{
  --header-h:52px;
  background:rgba(10,14,18,.97);
  border-bottom-color:var(--cyan-edge);
}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  z-index:5;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .1s linear;
}
.header-shell{
  display:flex;
  align-items:center;
  gap:clamp(.75rem,2vw,1.75rem);
  height:var(--header-h);
  transition:height .2s ease;
}

/* brand lockup */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  color:var(--white);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:2px solid var(--cyan);
  background:var(--ink-2);
  box-shadow:3px 3px 0 rgba(25,230,208,.22);
  color:var(--cyan);
  transition:box-shadow .18s ease,transform .18s ease;
}
.brand:hover .brand__mark{transform:translate(-1px,-1px);box-shadow:5px 5px 0 rgba(25,230,208,.3);}
.brand__mark-inner{font-family:var(--font-mono);font-size:.85rem;font-weight:700;letter-spacing:.02em;}
.brand__text{display:block;}
.brand__name{
  display:block;
  font-size:1.02rem;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.15;
  color:var(--white);
}
.brand__meta{
  display:block;
  margin-top:.15rem;
  font-size:.6rem;
  letter-spacing:.14em;
  color:var(--muted);
}
.site-header[data-condensed] .brand__meta{display:none;}
.header-ticker{
  font-size:.66rem;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
  padding-left:clamp(.5rem,1.6vw,1.25rem);
  border-left:1px solid var(--line);
}

/* desktop navigation */
.header-nav{
  margin-inline-start:auto;
  flex:0 0 auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:.25rem;
  counter-reset:navc;
}
.nav-item{counter-increment:navc;}
.nav-link{
  display:flex;
  align-items:center;
  gap:.5em;
  padding:.5rem .8rem;
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--silver);
  border:1px solid transparent;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.nav-link::before{
  content:counter(navc,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.06em;
  color:var(--muted);
  transition:color .16s ease;
}
.nav-link:hover{color:var(--white);background:var(--ink-2);border-color:var(--line);}
.nav-link:hover::before{color:var(--cyan);}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
}
.nav-link[aria-current="page"]::before{color:rgba(10,14,18,.62);}

/* mobile toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.5rem .7rem;
  border:1px solid var(--line);
  color:var(--silver);
  font-size:.72rem;
  letter-spacing:.1em;
  transition:color .16s ease,border-color .16s ease;
}
.nav-toggle:hover{color:var(--white);border-color:var(--cyan-edge);}
.nav-toggle__bars{display:grid;gap:3px;width:16px;}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .18s ease,opacity .18s ease;}
.nav-toggle[aria-expanded="true"]{color:var(--cyan);border-color:var(--cyan);}
.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);}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--ink-2);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(320px,45%);
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}
.footer-shell{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(1.5rem,4vw,3rem);
  padding-block:clamp(2.5rem,6vw,4.5rem);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:.9rem;}
.brand--footer{color:var(--white);}
.footer-note{font-size:.92rem;color:var(--silver);max-width:34ch;}
.footer-status{
  display:flex;
  align-items:center;
  gap:.5rem;
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--cyan);
}
.dot{
  width:8px;
  height:8px;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(61,214,140,.16);
  flex:0 0 auto;
}
.footer-col{display:block;}
.footer-title{
  position:relative;
  padding-left:.85rem;
  margin-bottom:1rem;
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.55em;
  width:6px;
  height:6px;
  background:var(--cyan);
}
.footer-list li + li{margin-top:.55rem;}
.footer-list a{
  font-size:.94rem;
  color:var(--silver);
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease,padding-left .16s ease;
}
.footer-list a:hover{color:var(--white);border-bottom-color:var(--orange);padding-left:.25rem;}
.footer-mini{margin-top:1rem;font-size:.8rem;line-height:1.7;color:var(--muted);max-width:32ch;}

.contact-list{display:grid;gap:.85rem;}
.contact-row{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.9rem;}
.contact-key{
  flex:0 0 auto;
  font-size:.66rem;
  letter-spacing:.12em;
  color:var(--muted);
  border:1px solid var(--line);
  padding:.1rem .4rem;
}
.contact-val{color:var(--silver);word-break:break-all;}
.copy-btn{
  flex:0 0 auto;
  padding:.18rem .5rem;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.1em;
  color:var(--cyan);
  border:1px solid var(--cyan-edge);
  background:var(--cyan-soft);
  transition:background .16s ease,color .16s ease;
}
.copy-btn:hover{background:var(--cyan);color:var(--ink);}
.copy-btn[data-copied]{background:var(--green);border-color:var(--green);color:var(--ink);}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
  padding-block:.95rem;
  border-top:1px solid var(--line);
  font-size:.8rem;
  color:var(--muted);
}
.footer-legal,.footer-meta{max-width:none;}
.footer-meta{font-size:.7rem;letter-spacing:.12em;}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .footer-shell{grid-template-columns:1.4fr 1fr 1fr;gap:clamp(1.25rem,3.5vw,2.25rem);}
  .footer-col--contact{grid-column:span 3;}
}
@media (max-width:960px){
  .header-ticker{display:none;}
  .nav-toggle{display:inline-flex;margin-inline-start:auto;}
  .header-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    margin-inline-start:0;
    padding:.6rem var(--pad-x) 1rem;
    background:var(--ink-2);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 14px 0 rgba(0,0,0,.28);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .18s ease,transform .18s ease,visibility .18s linear;
  }
  .header-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link{
    padding:.85rem .3rem;
    border:0;
    border-bottom:1px solid var(--line);
    font-size:.98rem;
  }
  .nav-link[aria-current="page"]{background:transparent;color:var(--cyan);}
  .nav-link[aria-current="page"]::before{color:var(--cyan);}
  .nav-link:hover{background:rgba(25,230,208,.06);border-color:var(--line);}
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6;}
  .index-rail{position:static;top:auto;}
}
@media (max-width:720px){
  .footer-shell{grid-template-columns:1fr;gap:2rem;}
  .footer-col--contact{grid-column:auto;}
  .footer-shell{padding-block:2.5rem;}
  .footer-base{flex-direction:column;align-items:flex-start;}
  .site-header{--header-h:64px;}
  .site-header[data-condensed]{--header-h:56px;}
  .brand__mark{width:34px;height:34px;}
  .brand__meta{display:none;}
  .grid{gap:1rem;}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6;}
  .data-table{font-size:.84rem;}
}
@media (max-width:480px){
  .grid{grid-template-columns:1fr;}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 1;}
  .tabs__list{gap:.3rem;}
  .tabs__tab{padding:.45rem .65rem;font-size:.72rem;}
}

/* ---------- accessibility ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
  .scroll-progress{transition:none;}
  .btn:hover,.card:hover,.brand:hover .brand__mark,.footer-list a:hover{transform:none;}
}