/* =========================================================
   中欧赛场 · 共享样式表 /assets/site.css
   夜间赛场指挥中心 / 纵向叙事长卷
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{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;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 设计变量 ---------- */
:root{
  --night-blue:#060E1C;
  --deep-blue:#0B1B33;
  --orange:#FF6A1F;
  --red-orange:#E2402B;
  --cyan:#35E5D0;
  --gold:#F2B441;
  --cream:#F4EBDC;
  --ink:#2A1F1A;
  --ink-soft:#4A3830;
  --ink-accent:#A62D18;
  --glass:rgba(255,255,255,0.08);
  --haze:#8FA3BF;
  --text:#DCE6F5;
  --text-strong:#FFFFFF;
  --line:rgba(143,163,191,0.22);
  --line-cyan:rgba(53,229,208,0.24);
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --max:1320px;
  --gutter:26px;
  --radius:2px;
  --shadow:0 18px 40px rgba(4,10,20,0.5);
  --ease:cubic-bezier(0.22,0.61,0.36,1);
  --header-h:112px;
}

/* ---------- 3. 基础排版 ---------- */
body{
  background-color:var(--deep-blue);
  background-image:linear-gradient(180deg,#0B1B33 0%,#0B1B33 55%,#0A1830 100%);
  color:var(--text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
}

/* 页面画框：左右竖向细边框 */
body::before,
body::after{
  content:"";
  position:fixed;
  top:0;
  bottom:0;
  width:1px;
  z-index:300;
  pointer-events:none;
  background:linear-gradient(180deg,
    rgba(53,229,208,0.45) 0%,
    rgba(143,163,191,0.18) 42%,
    rgba(53,229,208,0.06) 82%,
    transparent 100%);
}
body::before{left:14px}
body::after{right:14px}

h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:800;letter-spacing:-0.02em;line-height:1.18;color:var(--text-strong)}
h1{font-size:clamp(34px,5.2vw,64px)}
h2{font-size:clamp(26px,3.6vw,44px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:18px}
strong{font-weight:700;color:var(--text-strong)}

.prose{max-width:72ch}
.prose p + p{margin-top:1.1em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em}

.link{color:var(--cyan);border-bottom:1px solid rgba(53,229,208,0.4);transition:color .18s var(--ease),border-color .18s var(--ease)}
.link:hover{color:var(--text-strong);border-bottom-color:var(--orange)}

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

/* ---------- 4. 版心与网格 ---------- */
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:920px}

.section{position:relative;padding:72px 0}
.section--dark{background:rgba(6,14,28,0.72)}
.section--glass{background:rgba(255,255,255,0.03)}
.section--tight{padding:44px 0}

.grid{display:grid;gap:22px}
.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(0,3fr) minmax(0,9fr);gap:30px}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:0.04em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--radius);
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--orange);color:#0B1B33}
.btn-primary:hover{background:#FF8340;transform:translateY(-1px)}
.btn-ghost{background:rgba(53,229,208,0.06);color:var(--cyan);border-color:rgba(53,229,208,0.42)}
.btn-ghost:hover{background:rgba(53,229,208,0.16);color:#EAFBF8}
.btn-outline{background:transparent;color:var(--text);border-color:var(--line)}
.btn-outline:hover{border-color:var(--orange);color:var(--orange)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  font-size:13px;
  letter-spacing:0.08em;
  line-height:1.5;
  color:var(--haze);
  border:1px solid var(--line);
  border-radius:999px;
}
.tag--orange{color:var(--orange);border-color:rgba(255,106,31,0.5)}
.tag--cyan{color:var(--cyan);border-color:rgba(53,229,208,0.5)}
.tag--gold{color:var(--gold);border-color:rgba(242,180,65,0.5)}

/* ---------- 6. 数据排版 ---------- */
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-0.02em}
.score{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(40px,7vw,68px);
  line-height:1;
  color:var(--text-strong);
  letter-spacing:-0.03em;
}
.meta{font-size:13px;letter-spacing:0.08em;color:var(--haze);line-height:1.6}

/* ---------- 7. 内容层 ---------- */
.glass{
  background:var(--glass);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  padding:22px;
}

.cream{
  background:var(--cream);
  color:var(--ink);
  border-radius:var(--radius);
  padding:34px 30px;
  box-shadow:var(--shadow);
  font-size:17px;
  line-height:1.85;
}
.cream h1,.cream h2,.cream h3,.cream h4{color:var(--ink)}
.cream p{color:var(--ink-soft)}
.cream .meta,.cream .meta span{color:#6B5548}
.cream .tag{color:#6B5548;border-color:rgba(42,31,26,0.25)}
.cream a{color:var(--ink-accent);border-bottom:1px solid rgba(166,45,24,0.4)}
.cream a:hover{color:var(--ink);border-bottom-color:var(--orange)}
.cream .num,.cream .score{color:var(--ink)}

.card{
  position:relative;
  background:linear-gradient(180deg,rgba(255,255,255,0.07),rgba(255,255,255,0.02));
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  box-shadow:0 16px 32px rgba(4,10,20,0.38);
}
.card--slash{overflow:hidden}
.card--slash::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:56px;
  background:linear-gradient(90deg,rgba(255,106,31,0.24),rgba(255,106,31,0));
  clip-path:polygon(0 0,100% 0,0 100%);
  pointer-events:none;
}
.panel{
  background:rgba(6,14,28,0.6);
  border:1px solid var(--line);
  border-left:3px solid var(--cyan);
  border-radius:var(--radius);
  padding:20px 22px;
}

/* ---------- 8. 章节体系 ---------- */
.chapter{position:relative;padding:66px 0;scroll-margin-top:130px}
.chapter-band{
  width:64px;
  height:6px;
  background:linear-gradient(90deg,var(--orange),var(--red-orange) 55%,rgba(226,64,43,0));
  transition:width .42s var(--ease),background .42s var(--ease);
}
.chapter.is-current .chapter-band{width:190px}
.chapter-number{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(72px,11vw,124px);
  line-height:0.82;
  letter-spacing:-0.05em;
  color:rgba(53,229,208,0.16);
  -webkit-text-stroke:1.5px rgba(53,229,208,0.5);
  transition:color .42s var(--ease);
  user-select:none;
}
.chapter.is-current .chapter-number{color:rgba(53,229,208,0.26)}
.chapter-eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:0.14em;
  color:var(--haze);
  margin-bottom:10px;
}
.chapter-title{margin-bottom:14px}
.chapter-lead{max-width:64ch;color:var(--haze)}

/* ---------- 9. 图片容器（页面阶段放置占位） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  aspect-ratio:16 / 9;
  background:
    linear-gradient(135deg,#0B1B33 0%,#060E1C 58%,#12233D 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame__tag{
  position:absolute;
  left:0;
  bottom:0;
  padding:6px 12px;
  font-size:12px;
  letter-spacing:0.1em;
  color:var(--cyan);
  background:rgba(6,14,28,0.82);
}
.media-frame__scan{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(53,229,208,0.07) 0 1px,transparent 1px 44px);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs{
  padding:16px 0;
  border-bottom:1px solid var(--line);
  background:rgba(6,14,28,0.55);
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--haze);
}
.breadcrumb-list li{display:flex;align-items:center;gap:8px}
.breadcrumb-list li + li::before{content:"/";color:rgba(143,163,191,0.5)}
.breadcrumb-list a:hover{color:var(--cyan)}
.breadcrumb-list [aria-current="page"]{color:var(--text-strong)}

/* ---------- 11. 展开面板协议 ---------- */
[data-expand-panel]{display:none}
[data-expand-panel][data-open]{display:block}

/* ---------- 12. 显现动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 13. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg,rgba(6,14,28,0.98),rgba(6,14,28,0.9));
  border-bottom:1px solid var(--line-cyan);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.header-frame{
  position:relative;
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-64px;
  z-index:400;
  padding:10px 18px;
  background:var(--orange);
  color:#0B1B33;
  font-weight:700;
  font-size:14px;
  border-radius:0 0 var(--radius) var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:0}

.header-status{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 20px;
  padding:8px 0;
  border-bottom:1px solid rgba(143,163,191,0.14);
  font-size:12px;
  letter-spacing:0.08em;
  color:var(--haze);
  font-variant-numeric:tabular-nums;
}
.status-item{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.status-item + .status-item{padding-left:20px;border-left:1px solid rgba(143,163,191,0.16)}
.status-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  flex:0 0 auto;
  display:inline-block;
}
.status-dot--cyan{background:var(--cyan);opacity:.75}
.status-dot--live{
  background:var(--orange);
  box-shadow:0 0 0 0 rgba(255,106,31,0.55);
  animation:breathe 2.4s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(255,106,31,0.55)}
  50%{opacity:.45;box-shadow:0 0 0 6px rgba(255,106,31,0)}
}

.header-inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:70px;
  padding:10px 0;
}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:0 0 auto;
  background:linear-gradient(135deg,var(--orange),var(--red-orange));
  color:#0B1B33;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:19px;font-weight:800;color:var(--text-strong);letter-spacing:0.02em}
.brand-tagline{font-size:11px;letter-spacing:0.14em;color:var(--cyan);opacity:.85}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  display:block;
  padding:10px 12px;
  font-size:15px;
  font-weight:600;
  color:#C7D5E8;
  border-radius:var(--radius);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:3px;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease),background-color .22s var(--ease);
}
.nav-link:hover{color:var(--text-strong);background:rgba(53,229,208,0.07)}
.nav-link:hover::after{transform:scaleX(0.55)}
.nav-link[aria-current="page"]{color:var(--text-strong);background:rgba(255,106,31,0.08)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link:focus-visible{outline:2px solid var(--orange);outline-offset:2px}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:14px}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid rgba(143,163,191,0.35);
  border-radius:var(--radius);
  position:relative;
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(53,229,208,0.08)}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  position:absolute;
  left:50%;
  width:20px;
  height:2px;
  margin-left:-10px;
  background:var(--text-strong);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle-bars{top:50%;margin-top:-1px}
.nav-toggle-bars::before{content:"";left:0;margin-left:0;top:-6px}
.nav-toggle-bars::after{content:"";left:0;margin-left:0;top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg);background:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--orange)}

.read-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:rgba(143,163,191,0.14);
  overflow:hidden;
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--night-blue);
  color:#C7D5E8;
  overflow:hidden;
  margin-top:36px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:220px;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(143,163,191,0.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,163,191,0.09) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,0.9),transparent);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,0.9),transparent);
}
.footer-band{
  height:10px;
  background:linear-gradient(90deg,var(--orange),var(--red-orange) 52%,#0B1B33 100%);
  transform:skewY(-0.6deg);
  transform-origin:left bottom;
}
.footer-inner{
  position:relative;
  max-width:var(--max);
  margin:0 auto;
  padding:56px var(--gutter) 38px;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,2.6fr);
  gap:44px;
}
.footer-brand{display:flex;flex-direction:column;gap:8px}
.footer-logo{
  font-family:var(--font-display);
  font-size:26px;
  font-weight:800;
  letter-spacing:-0.02em;
  color:var(--text-strong);
}
.footer-tagline{font-size:13px;letter-spacing:0.14em;color:var(--cyan)}
.footer-region{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:6px;
  font-size:13px;
  letter-spacing:0.08em;
  color:var(--haze);
}
.footer-region-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--gold);
  flex:0 0 auto;
}
.footer-address{font-size:13px;line-height:1.7;color:var(--haze);max-width:30ch}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:26px;
}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:0.12em;
  color:var(--text-strong);
  padding-bottom:10px;
  border-bottom:1px solid rgba(255,106,31,0.32);
}
.footer-list{display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.footer-list a{
  color:#C7D5E8;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:rgba(53,229,208,0.5)}
.footer-text{font-size:13px;line-height:1.75;color:var(--haze)}

.footer-base{position:relative;border-top:1px solid rgba(143,163,191,0.14)}
.footer-base-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:22px var(--gutter) 34px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.footer-contact{font-size:13px;line-height:1.7;color:var(--haze)}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  font-size:13px;
  color:var(--haze);
}
.footer-legal a{color:#C7D5E8;border-bottom:1px solid rgba(143,163,191,0.35);transition:color .18s var(--ease),border-color .18s var(--ease)}
.footer-legal a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-icp{font-family:var(--font-mono);font-size:12px;letter-spacing:0.04em}
.footer-copy{font-family:var(--font-mono);font-size:12px;color:rgba(143,163,191,0.85)}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1280px){
  .header-actions .btn-ghost{display:none}
  .nav-link{padding:10px 10px}
  .nav-link::after{left:10px;right:10px}
}

@media (max-width:1100px){
  :root{--gutter:20px}
  .nav-toggle{display:block}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    display:none;
    padding:10px var(--gutter) 20px;
    background:linear-gradient(180deg,#060E1C,#0B1B33);
    border-top:1px solid var(--line-cyan);
    border-bottom:1px solid var(--line-cyan);
    box-shadow:0 24px 44px rgba(3,8,16,0.6);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{padding:14px 4px;font-size:16px;border-bottom:1px solid rgba(143,163,191,0.12)}
  .nav-link::after{left:4px;right:auto;width:26px;bottom:9px}
  .nav-link:hover::after{transform:scaleX(1)}
  .header-actions{margin-left:auto}
  .grid-asym{grid-template-columns:minmax(0,1fr)}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-inner{grid-template-columns:minmax(0,1fr);gap:34px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1000px){
  body::before,body::after{display:none}
}

@media (max-width:760px){
  .header-status{gap:0 14px;font-size:11.5px}
  .status-item + .status-item{padding-left:14px}
  .status-item--optional{display:none}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .section{padding:54px 0}
  .chapter{padding:48px 0}
  .cream{padding:26px 20px}
  .footer-cols{gap:22px}
}

@media (max-width:560px){
  :root{--gutter:18px}
  .brand-tagline{display:none}
  .brand-name{font-size:17px}
  .brand-mark{width:36px;height:36px;font-size:17px}
  .header-inner{gap:10px;min-height:62px}
  .header-actions{gap:8px;margin-left:auto}
  .btn{padding:9px 13px;font-size:13px}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .footer-base-inner{flex-direction:column;align-items:flex-start}
  .footer-legal{gap:12px}
}

/* ---------- 16. 偏好与可访问性 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .read-progress__bar{transition:none}
}