/* =========================================================================
   8868皇冠中文平台 · 共享样式表  /assets/site.css
   夜间赛场指挥室视觉体系 · 展览画册式布局
   00 令牌 / 01 Reset / 02 排版 / 03 结构壳 / 04 按钮
   05 页头 / 06 页脚 / 07 基础组件 / 08 媒体容器 / 09 动效与可访问性
   ========================================================================= */

/* ---------- 00 令牌 ---------- */
:root{
  --bg-deep:#0A2620;
  --bg-deep-lift:#0E3129;
  --bg-void:#050D0C;
  --bg-rise:#071A15;
  --panel:#143A31;
  --panel-alt:#2B1B4A;

  --gold:#C9A227;
  --gold-hi:#F0D67A;
  --ink:#EADFC8;
  --muted:#7F938C;
  --cyan:#3FE0D0;
  --amber:#D98324;

  --line:rgba(201,162,39,.30);
  --line-strong:rgba(201,162,39,.60);
  --line-soft:rgba(234,223,200,.10);
  --line-cyan:rgba(63,224,208,.34);

  --shadow-1:0 1px 0 rgba(0,0,0,.5);
  --shadow-2:0 26px 60px -36px rgba(0,0,0,.95);

  --font-display:"Barlow Condensed","Oswald","Arial Narrow","Helvetica Neue","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell-max:1240px;
  --shell-wide:1460px;
  --shell-narrow:860px;
  --gutter:clamp(20px,5vw,56px);
  --gap:24px;
  --radius:2px;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 01 Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,hr{ margin:0; }
ul,ol{ padding:0; list-style:none; }
img,svg,video{ display:block; max-width:100%; }
button,input,select,textarea{ font:inherit; color:inherit; }
button{ background:none; border:0; }
table{ border-collapse:collapse; width:100%; }

/* ---------- 02 排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--bg-deep);
  background-image:
    radial-gradient(1100px 620px at 6% -14%, rgba(43,27,74,.58), transparent 62%),
    radial-gradient(880px 520px at 104% 0%, rgba(63,224,208,.055), transparent 68%),
    linear-gradient(180deg, var(--bg-deep-lift) 0%, var(--bg-deep) 36%, var(--bg-rise) 72%, var(--bg-void) 100%);
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(15px,.34vw + 13.6px,17px);
  line-height:1.85;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.16;
  letter-spacing:-.02em;
  color:var(--ink);
}
h1{ font-size:clamp(2.2rem,5.6vw,4.4rem); }
h2{ font-size:clamp(1.6rem,2.9vw,2.5rem); }
h3{ font-size:clamp(1.15rem,1.5vw,1.5rem); }
h4{ font-size:1.02rem; }

a{
  color:var(--gold-hi);
  text-decoration:none;
  transition:color .2s var(--ease),border-color .2s var(--ease),opacity .2s var(--ease);
}
a:hover{ color:#FFF3D0; }

strong{ color:var(--gold-hi); font-weight:600; }
::selection{ background:rgba(201,162,39,.35); color:#FFF8E6; }

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

/* ---------- 03 结构壳 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--wide{ max-width:var(--shell-wide); }
.shell--narrow{ max-width:var(--shell-narrow); }

.section{
  position:relative;
  padding-block:clamp(56px,8vw,112px);
}
.section--tight{ padding-block:clamp(34px,5vw,64px); }

.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--line) 0%,rgba(201,162,39,.10) 62%,rgba(201,162,39,0) 100%);
}

.grid{ display:grid; gap:var(--gap); }
.grid--12{ grid-template-columns:repeat(12,minmax(0,1fr)); }
.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; }

/* ---------- 04 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid var(--line);
  background:transparent;
  border-radius:var(--radius);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:13px;
  line-height:1.4;
  letter-spacing:.1em;
  white-space:nowrap;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{
  border-color:var(--gold);
  color:var(--gold-hi);
  background:rgba(201,162,39,.09);
}
.btn--ghost{
  border-color:var(--line);
  color:var(--ink);
}
.btn--gold{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--bg-void);
  font-weight:600;
}
.btn--gold:hover{
  background:var(--gold-hi);
  border-color:var(--gold-hi);
  color:var(--bg-void);
}
.btn--block{ width:100%; }

/* ---------- 05 页头 ---------- */
.skip-link{
  position:absolute;
  top:0;
  left:-9999px;
  z-index:200;
  padding:12px 20px;
  background:var(--gold);
  color:var(--bg-void);
  font-size:13px;
  letter-spacing:.1em;
}
.skip-link:focus{
  left:12px;
  top:12px;
}

.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:linear-gradient(180deg,rgba(5,13,12,.97) 0%,rgba(8,30,26,.95) 100%);
  border-bottom:1px solid var(--line);
  box-shadow:0 20px 44px -38px rgba(0,0,0,1);
}

.site-header__top{ border-bottom:1px solid var(--line-soft); }

.header-top{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  min-height:70px;
  padding-block:10px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  margin-inline-end:auto;
  color:var(--ink);
}
.brand__mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(201,162,39,.06);
  color:var(--gold);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.brand:hover .brand__mark{
  color:var(--gold-hi);
  border-color:var(--gold);
  background:rgba(201,162,39,.15);
}
.brand__text{ display:flex; flex-direction:column; min-width:0; }
.brand__name{
  font-family:var(--font-display);
  font-size:21px;
  line-height:1.06;
  letter-spacing:.02em;
  color:var(--ink);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.5;
  letter-spacing:.16em;
  color:var(--muted);
  white-space:nowrap;
}

/* 线路状态 */
.line-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 13px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:rgba(63,224,208,.04);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}
.line-status__dot{
  flex:0 0 auto;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  animation:linePulse 2s var(--ease) infinite;
}
.line-status__num{ color:var(--cyan); font-weight:700; }
.line-status__total{ color:var(--muted); }

@keyframes linePulse{
  0%{ box-shadow:0 0 0 0 rgba(63,224,208,.5); }
  70%{ box-shadow:0 0 0 8px rgba(63,224,208,0); }
  100%{ box-shadow:0 0 0 0 rgba(63,224,208,0); }
}

.header-actions{ display:flex; align-items:center; gap:10px; }

/* 移动端切换按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{ border-color:var(--gold); color:var(--gold-hi); }
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1px;
  background:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle__bars::before{ top:0; }
.nav-toggle__bars::after{ top:9px; }
.site-header[data-open] .nav-toggle__bars::before{ top:4px; transform:rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after{ top:4px; transform:rotate(-45deg); }
.nav-toggle__text{ line-height:1; }

/* 栏目层 */
.site-header__bottom{ border-top:0; }
.header-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.primary-nav{ flex:1 1 auto; min-width:0; }
.nav-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:clamp(4px,1.8vw,34px);
}
.nav-list__item{ display:block; }
.nav-list a{
  position:relative;
  display:inline-block;
  padding:15px 0 17px;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--muted);
  transition:color .2s var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:9px;
  width:0;
  height:2px;
  background:var(--gold);
  transition:width .18s var(--ease);
}
.nav-list a:hover{ color:var(--ink); }
.nav-list a:hover::after{ width:100%; }
.nav-list a[aria-current="page"]{ color:var(--gold-hi); }
.nav-list a[aria-current="page"]::after{ width:100%; }

.nav-aside{ display:none; }
.nav-aside__status{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}

/* 滚动进度线 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--gold) 0%,var(--gold-hi) 46%,var(--cyan) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .1s linear;
  pointer-events:none;
}

/* ---------- 06 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,110px);
  background:linear-gradient(180deg,var(--bg-rise) 0%,var(--bg-void) 70%,var(--bg-void) 100%);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(26px,3.4vw,48px);
  padding-block:clamp(48px,7vw,84px) clamp(34px,5vw,56px);
}
.footer-col{ min-width:0; }
.footer-col--brand .brand{ margin-inline-end:0; }
.brand--footer{ margin-bottom:20px; }
.footer-title{
  margin-bottom:16px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
}
.footer-note{
  max-width:34em;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.footer-filing{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-list a{
  font-size:14px;
  color:var(--ink);
  opacity:.82;
}
.footer-list a:hover{ color:var(--gold-hi); opacity:1; }
.footer-list--contact li{
  display:flex;
  flex-direction:column;
  gap:3px;
}
.footer-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer-value{
  font-size:14px;
  line-height:1.7;
  color:var(--ink);
  opacity:.86;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-block:22px 28px;
  border-top:1px solid var(--line-soft);
}
.footer-copy,
.footer-meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

.to-top{
  position:fixed;
  right:clamp(16px,3vw,34px);
  bottom:clamp(16px,3vw,34px);
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(5,13,12,.92);
  color:var(--gold-hi);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s 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(--gold);
  background:rgba(201,162,39,.16);
}

/* ---------- 07 基础组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--gold);
}

.index-num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gold);
  white-space:nowrap;
}
.tag--live{ color:var(--cyan); border-color:var(--line-cyan); }
.tag--warn{ color:var(--amber); border-color:rgba(217,131,36,.42); }

.panel{
  position:relative;
  padding:clamp(20px,2.4vw,32px);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(20,58,49,.92) 0%,rgba(10,38,32,.94) 100%);
  box-shadow:var(--shadow-2);
}
.panel--violet{
  background:linear-gradient(160deg,rgba(43,27,74,.86) 0%,rgba(10,38,32,.94) 100%);
}
.panel__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:14px;
  margin-bottom:18px;
  border-bottom:1px solid var(--line-soft);
}
.panel__title{
  font-family:var(--font-display);
  font-size:1.05rem;
  letter-spacing:.02em;
  color:var(--ink);
}
.panel__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

.num{
  font-family:var(--font-mono);
  font-weight:700;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.num--xl{
  display:block;
  font-size:clamp(2.6rem,7vw,4.6rem);
  font-weight:800;
  line-height:1;
  letter-spacing:.01em;
  color:var(--gold-hi);
}
.num--cyan{ color:var(--cyan); }

.breadcrumb{ padding-block:18px; }
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.breadcrumb li::after{
  content:"/";
  margin-left:10px;
  color:rgba(127,147,140,.5);
}
.breadcrumb li:last-child::after{ content:""; }
.breadcrumb a{ color:var(--muted); }
.breadcrumb a:hover{ color:var(--gold-hi); }
.breadcrumb [aria-current="page"]{ color:var(--ink); }

.prose{ max-width:68ch; }
.prose > * + *{ margin-top:1.1em; }
.prose h2{ margin-top:2.1em; }
.prose h3{ margin-top:1.7em; }
.prose ul,
.prose ol{ padding-left:1.2em; }
.prose ul{ list-style:square; }
.prose ol{ list-style:decimal; }
.prose li + li{ margin-top:.42em; }
.prose li::marker{ color:var(--gold); }
.prose a{ border-bottom:1px solid var(--line); }
.prose a:hover{ border-bottom-color:var(--gold-hi); }
.prose blockquote{
  padding-left:18px;
  border-left:2px solid var(--gold);
  color:var(--muted);
}

.accordion{ border-top:1px solid var(--line-soft); }
.accordion__item{ border-bottom:1px solid var(--line-soft); }
.accordion__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:18px 0;
  text-align:left;
  color:var(--ink);
  font-family:var(--font-display);
  font-size:1.05rem;
  letter-spacing:.01em;
  cursor:pointer;
  transition:color .2s var(--ease);
}
.accordion__trigger:hover{ color:var(--gold-hi); }
.accordion__trigger::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:16px;
  color:var(--gold);
  transition:transform .24s var(--ease);
}
.accordion__item[data-open] .accordion__trigger::after{ transform:rotate(45deg); }
.accordion__panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .24s var(--ease);
}
.accordion__panel > *{
  overflow:hidden;
  min-height:0;
}
.accordion__item[data-open] .accordion__panel{ grid-template-rows:1fr; }

/* ---------- 08 媒体容器 ---------- */
.figure{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(148deg,#17453A 0%,var(--bg-deep) 55%,var(--panel-alt) 100%);
  box-shadow:var(--shadow-2);
}
.figure::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background-image:linear-gradient(104deg,transparent 44%,rgba(63,224,208,.11) 50%,transparent 56%);
  pointer-events:none;
}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background-image:
    linear-gradient(180deg,rgba(5,13,12,0) 46%,rgba(5,13,12,.62) 100%),
    linear-gradient(90deg,rgba(201,162,39,.10),transparent 42%);
  pointer-events:none;
}
.figure > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}
.figure--16x9{ aspect-ratio:16 / 9; }
.figure--4x3{ aspect-ratio:4 / 3; }
.figure--3x4{ aspect-ratio:3 / 4; }
.figure--1x1{ aspect-ratio:1 / 1; }

.figure-caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- 09 动效与可访问性 ---------- */
[data-reveal-armed]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
[data-reveal-armed][data-visible]{
  opacity:1;
  transform:none;
}

@media (max-width:1199px){
  .line-status{ display:none; }
  .nav-list{ gap:clamp(4px,1.4vw,22px); }
}

@media (max-width:1080px){
  .brand__sub{ display:none; }
  .btn{ padding:9px 13px; font-size:12px; }
}

@media (max-width:1024px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}

@media (max-width:900px){
  .header-actions{ display:none; }
  .nav-toggle{ display:inline-flex; }

  .site-header__bottom{
    display:none;
    border-top:1px solid var(--line-soft);
  }
  .site-header[data-open] .site-header__bottom{ display:block; }

  .header-bottom{
    display:block;
    padding-block:6px 22px;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list a{
    display:block;
    padding:14px 0 14px 14px;
    border-left:2px solid transparent;
    font-size:15px;
  }
  .nav-list a::after{ display:none; }
  .nav-list a[aria-current="page"]{
    border-left-color:var(--gold);
    background:linear-gradient(90deg,rgba(201,162,39,.10),transparent 70%);
  }
  .nav-aside{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-top:18px;
    padding-top:18px;
    border-top:1px solid var(--line-soft);
  }
  .nav-aside__status{ margin-bottom:4px; }

  .grid--12{ grid-template-columns:repeat(6,minmax(0,1fr)); }
  .col-4,.col-5,.col-6,.col-7,.col-8{ grid-column:span 6; }
}

@media (max-width:620px){
  .footer-grid{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .to-top{ padding:9px 13px; }
}

@media (max-width:560px){
  .grid--12{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{ grid-column:span 2; }
  .brand__name{ font-size:19px; }
  .brand__mark{ width:34px; height:34px; }
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{ scroll-behavior:auto; }
  [data-reveal-armed]{
    opacity:1 !important;
    transform:none !important;
  }
  .scroll-progress{ transition:none; }
}