/* ============================================================
   欧凯体育 CN · 共享样式表 /assets/site.css
   骨架：左侧框架式导航轨 + 纵向叙事长卷 + 深墨底 / 暖纸色停顿
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0B1B2B;
  --panel:#122A3F;
  --paper:#F1E7D6;
  --edge:#07111C;
  --cyan:#3EE0D6;
  --orange:#FF6A2B;
  --lime:#B7FF4A;
  --text:#F2F6F9;
  --muted:#9FB0C0;
  --paper-text:#12212E;
  --paper-accent:#B23A0B;
  --hair:rgba(62,224,214,.22);
  --hair-soft:rgba(159,176,192,.24);
  --rail-w:264px;
  --gutter:clamp(18px,4vw,56px);
  --maxw:1240px;
  --band-h:10px;
  --sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Barlow Condensed","Oswald","Archivo Narrow","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shadow-hard:8px 8px 0 rgba(7,17,28,.55);
}

/* ---------- 2. reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(62,224,214,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(62,224,214,.045) 1px,transparent 1px);
  background-size:80px 80px,80px 80px;
  background-attachment:fixed;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.6;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%;}
a{color:var(--cyan);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--lime);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;}
table{border-collapse:collapse;}
::selection{background:var(--orange);color:#0B1B2B;}
:focus-visible{outline:3px solid var(--lime);outline-offset:2px;}

/* ---------- 3. 中文排版层级 ---------- */
h1,h2,h3,h4{margin:0 0 .5em;font-family:var(--display);font-weight:800;line-height:1.12;letter-spacing:.02em;color:var(--text);}
h1{font-size:clamp(38px,6vw,82px);}
h2{font-size:clamp(26px,3.6vw,48px);}
h3{font-size:clamp(19px,2.2vw,26px);font-weight:700;}
h4{font-size:17px;font-weight:700;letter-spacing:.06em;}
p{margin:0 0 1em;max-width:70ch;}
strong{color:#fff;}
.display{font-family:var(--display);font-weight:800;font-size:clamp(28px,4vw,52px);line-height:1.1;letter-spacing:.01em;}
.display--xl{font-size:clamp(44px,7vw,96px);line-height:1.02;letter-spacing:0;}
.lede{font-size:clamp(16px,1.5vw,19px);color:var(--muted);max-width:58ch;}
.eyebrow{margin:0 0 10px;font-family:var(--mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);}
.note-vertical{
  writing-mode:vertical-rl;text-orientation:mixed;white-space:nowrap;
  font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--muted);
}
.tag{
  display:inline-block;padding:3px 8px;font-family:var(--mono);font-size:11px;
  letter-spacing:.14em;color:var(--cyan);border:1px solid var(--hair);
}

/* ---------- 4. 布局容器与叙事段落 ---------- */
#main-content{display:block;min-height:60vh;}
#main-content:focus{outline:none;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);}
.section{position:relative;padding:clamp(44px,7vw,96px) 0;}
.section--tight{padding:clamp(26px,4vw,52px) 0;}
.section--panel{background:var(--panel);border-top:2px solid var(--hair);border-bottom:2px solid var(--hair);}
.section--edge{background:var(--edge);border-top:2px solid rgba(62,224,214,.18);}
.section--paper{background:var(--paper);color:var(--paper-text);}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4,.section--paper .display{color:var(--paper-text);}
.section--paper p{color:#33424F;}
.section--paper a{color:var(--paper-accent);}
.section--paper .lede{color:#4B5B68;}
.section--paper .eyebrow,.section--paper .chapter__index{color:var(--paper-accent);}
.band{
  width:100%;height:var(--band-h);
  background:linear-gradient(90deg,
    var(--orange) 0 18%,
    var(--cyan) 18% 52%,
    var(--paper) 52% 72%,
    var(--lime) 72% 77%,
    rgba(62,224,214,.18) 77% 100%);
}
.chapter{display:grid;grid-template-columns:minmax(0,74px) minmax(0,1fr);gap:clamp(12px,2vw,26px);align-items:start;}
.chapter__index{font-family:var(--mono);font-size:clamp(24px,3.2vw,42px);font-weight:700;line-height:1;color:var(--cyan);letter-spacing:-.02em;}
.section-head{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:clamp(16px,3vw,44px);align-items:end;margin-bottom:clamp(20px,3vw,40px);}
.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.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:minmax(0,1.4fr) minmax(0,1fr);}

/* ---------- 5. 按钮 / 标签 / 状态 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  border:2px solid var(--cyan);background:var(--cyan);color:var(--edge);
  cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(62,224,214,.3);color:var(--edge);}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#1A0A02;font-weight:700;box-shadow:6px 6px 0 rgba(62,224,214,.22);}
.btn--primary:hover{box-shadow:9px 9px 0 rgba(62,224,214,.3);color:#1A0A02;}
.btn--ghost{background:transparent;color:var(--cyan);}
.btn--ghost:hover{background:var(--cyan);color:var(--edge);}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 9px;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
  border:1px solid var(--hair-soft);
}
.chip--status{color:var(--lime);border-color:rgba(183,255,74,.45);}
.chip__dot{width:6px;height:6px;border-radius:50%;background:var(--lime);box-shadow:0 0 8px rgba(183,255,74,.9);}
.stat{display:flex;flex-direction:column;gap:4px;}
.stat__value{font-family:var(--mono);font-size:clamp(26px,3.4vw,44px);font-weight:700;color:var(--orange);line-height:1;}
.stat__label{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--muted);}

/* ---------- 6. 页头：框架式纵向导航轨 ---------- */
.skip-link{
  position:fixed;left:14px;top:-120px;z-index:200;
  padding:10px 16px;background:var(--lime);color:var(--edge);
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;
  transition:top .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{top:14px;color:var(--edge);}

.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:80;
  background:var(--edge);color:var(--text);
  border-right:3px solid #0E2739;
}
.site-header::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:6px;
  background:linear-gradient(90deg,var(--orange) 0 34%,var(--cyan) 34% 72%,var(--paper) 72% 87%,var(--lime) 87% 100%);
}
.header-frame{
  position:relative;display:flex;flex-direction:column;
  height:100%;padding:28px 20px 22px;gap:20px;
}
.brand{position:relative;padding-right:26px;}
.brand__link{display:flex;align-items:flex-start;gap:10px;color:var(--text);}
.brand__link:hover{color:var(--text);}
.brand__mark{
  font-family:var(--display);font-size:31px;font-weight:800;line-height:.92;letter-spacing:.03em;
  padding-left:9px;border-left:6px solid var(--orange);
}
.brand__text{display:flex;flex-direction:column;gap:5px;padding-top:3px;}
.brand__name{font-family:var(--display);font-size:16px;font-weight:700;letter-spacing:.12em;}
.brand__sig{font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--cyan);}
.brand__axis{
  position:absolute;right:-4px;top:2px;
  writing-mode:vertical-rl;text-orientation:mixed;white-space:nowrap;
  font-family:var(--mono);font-size:10px;letter-spacing:.32em;color:rgba(159,176,192,.7);
}
.nav-toggle{
  display:none;align-items:center;gap:10px;padding:9px 12px;
  border:2px solid var(--cyan);background:rgba(62,224,214,.06);color:var(--cyan);
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;cursor:pointer;
  transition:background-color .18s ease,color .18s ease;
}
.nav-toggle__bars{position:relative;width:18px;height:2px;background:var(--cyan);}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);
  transition:transform .2s ease,background-color .2s ease;
}
.nav-toggle__bars::before{top:-6px;}
.nav-toggle__bars::after{top:6px;}
.site-header[data-open] .nav-toggle{background:var(--cyan);color:var(--edge);}
.site-header[data-open] .nav-toggle__bars{background:transparent;}
.site-header[data-open] .nav-toggle__bars::before{background:var(--edge);transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars::after{background:var(--edge);transform:translateY(-6px) rotate(-45deg);}

.site-nav{position:relative;z-index:1;display:flex;flex-direction:column;flex:1;min-height:0;gap:16px;}
.nav-list{position:relative;display:flex;flex-direction:column;gap:2px;padding:4px 26px 4px 0;}
.nav-list::before{
  content:"";position:absolute;left:34px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--orange),var(--cyan) 55%,rgba(62,224,214,.12));
}
.nav-item{position:relative;}
.nav-link{
  position:relative;display:grid;grid-template-columns:34px minmax(0,1fr);align-items:center;gap:14px;
  padding:9px 10px 9px 0;color:var(--muted);font-size:15px;letter-spacing:.08em;
  transition:color .18s ease,background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-index{font-family:var(--mono);font-size:11px;letter-spacing:.02em;color:var(--cyan);text-align:right;padding-right:6px;}
.nav-label{white-space:nowrap;}
.nav-link:hover{color:var(--text);background:rgba(62,224,214,.08);transform:translateX(3px);}
.nav-link[aria-current="page"]{
  background:var(--cyan);color:var(--edge);font-weight:700;
  box-shadow:6px 6px 0 rgba(255,106,43,.22);
}
.nav-link[aria-current="page"] .nav-index{color:var(--edge);}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;right:6px;width:6px;height:6px;background:var(--lime);
}
.nav-side{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:16px;
  border-top:1px dashed rgba(159,176,192,.28);
}
.nav-cta{width:100%;margin-top:6px;}
.rail-progress{
  position:absolute;top:0;right:0;width:3px;height:100%;
  background:rgba(159,176,192,.14);overflow:hidden;
}
.rail-progress__bar{
  display:block;width:100%;height:var(--progress,0%);
  background:linear-gradient(180deg,var(--orange),var(--cyan));
  transition:height .15s linear;
}
@media (min-width:900px){
  body{padding-left:var(--rail-w);}
}

/* ---------- 7. 通用内容组件 ---------- */
.card{
  position:relative;padding:clamp(18px,2.4vw,28px);
  background:var(--panel);border:2px solid var(--hair);box-shadow:var(--shadow-hard);
}
.card--float{transform:translateY(-12px);}
.card--paper{
  background:#FBF5EA;border-color:rgba(18,33,46,.18);color:var(--paper-text);
  box-shadow:10px 10px 0 rgba(7,17,28,.35);
}
.card__title{
  margin:0 0 12px;padding-bottom:10px;border-bottom:2px solid var(--cyan);
  font-family:var(--mono);font-size:15px;font-weight:700;letter-spacing:.08em;color:inherit;
}
.data-table{width:100%;font-family:var(--mono);font-size:14px;}
.data-table th,.data-table td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(159,176,192,.22);}
.data-table th{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);}
.data-table td{color:var(--text);}
.data-table tbody tr:hover{background:rgba(62,224,214,.06);}
.section--paper .data-table td{color:var(--paper-text);}
.section--paper .data-table th{color:var(--paper-accent);}
.disclosure{border:2px solid var(--hair-soft);background:rgba(18,42,63,.55);}
.disclosure + .disclosure{margin-top:10px;}
.disclosure__q{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 18px;cursor:pointer;list-style:none;
  font-family:var(--display);font-size:18px;font-weight:700;letter-spacing:.02em;
}
.disclosure__q::-webkit-details-marker{display:none;}
.disclosure__q::after{content:"+";font-family:var(--mono);font-size:20px;line-height:1;color:var(--cyan);}
.disclosure[open] .disclosure__q::after{content:"–";}
.disclosure__a{padding:0 18px 18px;color:var(--muted);}
.disclosure__a p:last-child{margin-bottom:0;}
.breadcrumbs{padding:14px 0;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted);}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumbs li{display:flex;align-items:center;gap:8px;}
.breadcrumbs li::after{content:"/";color:rgba(159,176,192,.5);}
.breadcrumbs li:last-child::after{content:"";}
.breadcrumbs a{color:var(--muted);}
.breadcrumbs a:hover{color:var(--cyan);}

/* ---------- 8. 图片容器基础规则（页面阶段放占位图） ---------- */
.media{
  position:relative;overflow:hidden;
  background:linear-gradient(155deg,#0E2438,#07111C 70%);
  border:2px solid var(--hair);
}
.media img{width:100%;height:100%;object-fit:cover;}
.media--wide{aspect-ratio:16/7;}
.media--square{aspect-ratio:1/1;}
.media--tall{aspect-ratio:4/5;}
.media__caption{padding-top:8px;font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted);}
.media-grid{display:grid;gap:clamp(12px,2vw,20px);grid-template-columns:repeat(auto-fit,minmax(220px,1fr));}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,120px);
  background:var(--edge);color:var(--text);
  border-top:2px solid rgba(62,224,214,.3);
}
.footer-band{display:grid;grid-template-columns:3fr 1fr 2fr .6fr;height:var(--band-h);}
.footer-band span:nth-child(1){background:var(--orange);}
.footer-band span:nth-child(2){background:var(--cyan);}
.footer-band span:nth-child(3){background:var(--paper);}
.footer-band span:nth-child(4){background:var(--lime);}
.footer-inner{
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding:clamp(32px,5vw,64px) var(--gutter) clamp(20px,3vw,36px);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);
  gap:clamp(24px,4vw,64px);
}
.footer-brand__name{
  display:flex;align-items:baseline;gap:10px;margin:0 0 12px;
  font-family:var(--display);font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:.06em;
}
.footer-brand__tag{
  padding:3px 7px;background:var(--cyan);color:var(--edge);
  font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.2em;
}
.footer-brand__desc{margin:0 0 12px;max-width:38ch;font-size:15px;color:var(--text);}
.footer-brand__note{
  display:flex;align-items:center;gap:8px;margin:0;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--lime);
}
.footer-brand__note::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:var(--lime);box-shadow:0 0 10px rgba(183,255,74,.85);
}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,32px);}
.footer-col__title{
  margin:0 0 14px;font-family:var(--mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
}
.footer-list{display:flex;flex-direction:column;gap:9px;}
.footer-link{
  display:inline-block;width:fit-content;padding:2px 0;
  font-size:15px;color:var(--muted);border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease,transform .16s ease;
}
.footer-link:hover{color:var(--text);border-color:var(--orange);transform:translateX(3px);}
.footer-contact{
  width:100%;max-width:var(--maxw);margin:0 auto;padding:20px var(--gutter);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px 28px;
  border-top:1px dashed rgba(159,176,192,.28);
  border-bottom:1px dashed rgba(159,176,192,.28);
}
.footer-contact__item{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:0;max-width:none;
  font-family:var(--mono);font-size:13px;color:var(--text);word-break:break-all;
}
.footer-contact__k{flex:0 0 auto;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);}
.copy-btn{
  padding:5px 9px;border:1px solid rgba(62,224,214,.5);background:rgba(62,224,214,.06);
  color:var(--cyan);font-family:var(--mono);font-size:11px;letter-spacing:.1em;cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.copy-btn:hover{background:var(--cyan);color:var(--edge);}
.copy-btn[data-copied]{background:var(--lime);border-color:var(--lime);color:var(--edge);}
.footer-legal{
  width:100%;max-width:var(--maxw);margin:0 auto;padding:18px var(--gutter) 28px;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 26px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
}
.footer-legal p{margin:0;max-width:none;}
.footer-legal__icp{color:var(--cyan);}
.footer-legal__copy{color:var(--text);}
.footer-legal__meta{color:rgba(159,176,192,.8);}

/* ---------- 10. 入场显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease;}
[data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 11. 响应式：平板 ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .section-head{grid-template-columns:minmax(0,1fr);align-items:start;}
  .footer-inner{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr);}
  .card--float{transform:none;}
}

/* ---------- 12. 响应式：移动端页头与页脚 ---------- */
@media (max-width:899px){
  body{padding-left:0;}
  .site-header{
    position:sticky;top:0;left:auto;bottom:auto;
    width:100%;height:auto;border-right:0;border-bottom:3px solid #0E2739;
  }
  .site-header::before{height:5px;}
  .header-frame{
    flex-direction:row;flex-wrap:wrap;align-items:center;
    height:auto;padding:12px 16px 10px;gap:10px;
  }
  .brand{flex:1 1 auto;padding-right:0;}
  .brand__mark{font-size:24px;border-left-width:5px;padding-left:8px;}
  .brand__name{font-size:15px;}
  .brand__axis{display:none;}
  .nav-toggle{display:inline-flex;flex:0 0 auto;}
  .site-nav{
    flex:1 1 100%;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;
    transition:max-height .32s ease,opacity .22s ease,visibility .22s ease;
  }
  .site-header[data-open] .site-nav{
    max-height:78vh;opacity:1;visibility:visible;overflow-y:auto;
    padding-bottom:8px;
  }
  .nav-list{padding:6px 0;}
  .nav-list::before{left:32px;}
  .nav-link{padding:11px 6px 11px 0;}
  .nav-side{margin-top:12px;padding-top:14px;}
  .nav-cta{width:auto;margin-top:8px;}
  .rail-progress{top:auto;bottom:0;left:0;right:0;width:100%;height:3px;}
  .rail-progress__bar{
    width:var(--progress,0%);height:100%;
    background:linear-gradient(90deg,var(--orange),var(--cyan));
    transition:width .15s linear;
  }
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));}
  .chapter{grid-template-columns:minmax(0,1fr);gap:6px;}
  .note-vertical{writing-mode:horizontal-tb;}
}
@media (max-width:560px){
  body{font-size:16px;}
  .footer-nav{grid-template-columns:minmax(0,1fr);gap:22px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:6px;}
  .disclosure__q{font-size:16px;padding:14px;}
}

/* ---------- 13. 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .rail-progress__bar{transition:none;}
}