/* ============================================================
   168体育官网 — /assets/site.css
   高原竞技数据台：湖蓝分层 + 荧光橙强调 + 切角仪器面板
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:124px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
table{border-collapse:collapse;width:100%}

/* ---------- tokens ---------- */
:root{
  --deep-lake:#0B4A6F;
  --lake:#1B7FB8;
  --mist:#D8E9F2;
  --arena:#1A1F24;
  --graphite:#2C343B;
  --night:#071A26;
  --orange:#FF6A1A;
  --amber:#FFB020;
  --cold:#8A96A0;
  --ice:#4FA3D1;
  --snow:#F7FAFC;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --cut:18px;
  --shadow-panel:0 18px 40px -24px rgba(0,0,0,.85);
}

/* ---------- base ---------- */
body{
  min-height:100vh;
  background:var(--arena);
  color:var(--snow);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.005em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(79,163,209,.06) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(79,163,209,.06) 1px,transparent 1px);
  background-size:64px 64px;
}
h1,h2,h3,h4,h5{
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
}
h1{font-size:clamp(34px,5vw,56px)}
h2{font-size:clamp(28px,3.4vw,44px)}
h3{font-size:clamp(22px,2.2vw,26px)}
h4{font-size:clamp(18px,1.6vw,20px);font-weight:800;letter-spacing:-.01em}
p{margin-bottom:22px}
p:last-child{margin-bottom:0}
a{color:var(--ice);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--snow)}
strong{font-weight:800;color:var(--snow)}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible{
  outline:2px solid var(--ice);
  outline-offset:3px;
}

#main-content{display:block;scroll-margin-top:124px}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:16px;
  z-index:200;
  transform:translateY(-130%);
  background:var(--orange);
  color:#08151C;
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  padding:11px 18px;
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(10px);color:#08151C}

/* ---------- layout ---------- */
.shell{
  width:100%;
  max-width:1280px;
  margin-inline:auto;
  padding-inline:24px;
}
.page-main{position:relative;z-index:1;display:block}
.section{padding-block:56px}
.section--tight{padding-block:32px}

.layout-rail{display:grid;grid-template-columns:minmax(180px,22%) minmax(0,1fr);gap:24px}
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.prose{max-width:68ch}
.prose p{line-height:1.85}

/* ---------- type helpers ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--ice);
  margin:0 0 12px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--orange);
  display:inline-block;
}
.index-num{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--orange);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-size:14px;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  background:transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.btn-primary{
  background:var(--orange);
  color:#08151C;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.btn-primary:hover,
.btn-primary:focus-visible{background:#FF8340;color:#08151C}
.btn-primary:focus-visible{box-shadow:inset 0 0 0 2px rgba(7,26,38,.55)}
.btn-ghost{
  color:var(--snow);
  background:rgba(11,74,111,.38);
  border-color:rgba(79,163,209,.5);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.btn-ghost:hover,
.btn-ghost:focus-visible{
  border-color:var(--ice);
  background:rgba(27,127,184,.4);
  color:var(--snow);
}

/* ---------- stamps ---------- */
.stamp{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.1em;
  color:var(--amber);
  border:1px solid rgba(255,176,32,.45);
  background:rgba(255,176,32,.07);
  padding:5px 9px;
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
}
.stamp--ghost{
  color:var(--ice);
  border-color:rgba(79,163,209,.42);
  background:rgba(27,127,184,.12);
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,var(--deep-lake) 0%,#08313F 62%,var(--night) 100%);
  border-bottom:1px solid rgba(79,163,209,.35);
}

.header-bar{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
}

/* brand */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--snow);
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  color:#08151C;
  background:var(--orange);
  padding:8px 12px;
  clip-path:polygon(0 0,100% 0,100% 64%,calc(100% - 12px) 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-label{font-size:17px;font-weight:800;letter-spacing:.03em}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:#7FB4D4;
  margin-top:3px;
}

/* nav toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  order:2;
  margin-left:auto;
  padding:9px 12px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--snow);
  border:1px solid rgba(79,163,209,.45);
  background:rgba(7,26,38,.4);
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--ice);background:rgba(27,127,184,.32)}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--orange);
  background:rgba(255,106,26,.16);
  color:var(--amber);
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars span{display:block;height:2px;background:currentColor}
.nav-toggle-bars span:nth-child(2){width:70%}
.nav-toggle-label{line-height:1}

/* primary nav */
.site-nav{display:block;visibility:visible;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:10px 11px;
  font-size:14px;
  font-weight:600;
  color:rgba(247,250,252,.74);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),
             background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.nav-list a:hover{
  color:var(--snow);
  background:rgba(27,127,184,.22);
  border-bottom-color:rgba(79,163,209,.6);
}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--cold);
  transition:color var(--dur) var(--ease);
}
.nav-list a:hover .nav-idx,
.nav-list a[aria-current="page"] .nav-idx{color:var(--orange)}
.nav-list a[aria-current="page"]{
  color:var(--snow);
  background:rgba(27,127,184,.38);
  border-bottom-color:var(--orange);
}

/* header tools */
.header-tools{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.version-badge{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--amber);
  border:1px solid rgba(255,176,32,.45);
  background:rgba(255,176,32,.08);
  padding:6px 10px;
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
}

/* telemetry strip */
.header-strip{
  border-top:1px solid rgba(79,163,209,.2);
  background:rgba(7,26,38,.55);
}
.strip-inner{
  display:flex;
  align-items:center;
  gap:14px;
  padding-block:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--cold);
}
.status-dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  background:var(--amber);
  transform:rotate(45deg);
}
.strip-text{color:rgba(247,250,252,.82);white-space:nowrap}
.strip-rule{
  flex:1 1 auto;
  min-width:24px;
  height:8px;
  background:repeating-linear-gradient(115deg,rgba(79,163,209,.55) 0 2px,transparent 2px 10px);
}
.strip-tail{white-space:nowrap}

/* scroll rail */
.scroll-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(79,163,209,.18);
  overflow:hidden;
}
.scroll-fill{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--lake) 0%,var(--ice) 60%,var(--orange) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background:linear-gradient(180deg,var(--night) 0%,#04121B 100%);
  border-top:1px solid rgba(79,163,209,.28);
  color:var(--snow);
}
.footer-hatch{
  height:8px;
  background:
    repeating-linear-gradient(135deg,var(--orange) 0 6px,transparent 6px 18px),
    linear-gradient(90deg,var(--deep-lake) 0%,var(--night) 100%);
  opacity:.92;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px 32px;
  padding-block:56px 38px;
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:rgba(247,250,252,.62);
  max-width:34ch;
  margin:0;
}
.footer-stamp{display:flex;flex-wrap:wrap;gap:8px}

.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-heading{
  font-size:12px;
  font-weight:800;
  letter-spacing:.18em;
  color:var(--ice);
  padding-left:11px;
  border-left:3px solid var(--orange);
  line-height:1.4;
}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-list a{
  display:inline-block;
  padding:5px 0;
  font-size:14.5px;
  color:rgba(247,250,252,.7);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-list a:hover,
.footer-list a:focus-visible{
  color:var(--snow);
  border-bottom-color:var(--orange);
}

.footer-contact{
  grid-column:1 / -1;
  margin-top:6px;
  padding-top:26px;
  border-top:1px solid rgba(79,163,209,.22);
}
.contact-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px 32px;
  margin-top:18px;
}
.contact-item--wide{grid-column:1 / -1}
.contact-item dt{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ice);
  margin-bottom:5px;
}
.contact-item dd{
  font-size:14.5px;
  line-height:1.65;
  color:rgba(247,250,252,.86);
}
.contact-note{
  margin-top:16px;
  font-size:12.5px;
  line-height:1.75;
  color:var(--cold);
  max-width:64ch;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding-block:20px 34px;
  border-top:1px solid rgba(79,163,209,.18);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--cold);
}
.copyright{margin:0}
.icp{margin:0;color:rgba(255,176,32,.82)}
.legal-list{display:flex;flex-wrap:wrap;gap:8px 20px;margin-left:auto}
.legal-list a{
  color:rgba(247,250,252,.66);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.legal-list a:hover,
.legal-list a:focus-visible{color:var(--snow);border-bottom-color:var(--ice)}

/* ---------- components ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cold);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:rgba(138,150,160,.55)}
.breadcrumb a{color:var(--ice);text-decoration:none}
.breadcrumb a:hover{color:var(--snow)}

.panel{
  position:relative;
  padding:24px;
  background:linear-gradient(180deg,rgba(44,52,59,.94) 0%,rgba(26,31,36,.97) 100%);
  border:1px solid rgba(79,163,209,.28);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
  transition:border-color var(--dur) var(--ease);
}
.panel--alt{
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
}
.panel:hover{border-color:rgba(79,163,209,.55)}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid rgba(79,163,209,.2);
  font-size:13px;
  font-weight:800;
  letter-spacing:.06em;
}
.panel-body{font-size:15px;line-height:1.8;color:rgba(247,250,252,.82)}

.data-table{font-size:14.5px}
.data-table th,
.data-table td{
  text-align:left;
  padding:10px 12px;
  border-bottom:1px solid rgba(79,163,209,.22);
}
.data-table th{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--ice);
}
.data-table td{font-variant-numeric:tabular-nums}
.data-table tbody tr:nth-child(even){background:rgba(27,127,184,.1)}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(135deg,var(--deep-lake) 0%,var(--night) 100%);
  border:1px solid rgba(79,163,209,.35);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.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,rgba(7,26,38,0) 45%,rgba(7,26,38,.74) 100%);
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-caption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:14px;
  z-index:1;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--snow);
}

/* ---------- reveal ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity 260ms var(--ease),transform 260ms var(--ease);
}
html.js [data-reveal].is-shown{opacity:1;transform:none}

[data-tab-panel][hidden]{display:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-list a{padding:10px 8px;font-size:13.5px}
  .header-tools{gap:10px}
}

@media (max-width:1023px){
  html{scroll-padding-top:112px}
  .header-bar{min-height:64px;gap:12px}
  .nav-toggle{display:inline-flex}
  .header-tools{order:3;margin-left:12px;gap:10px}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    padding-inline:24px;
    visibility:hidden;
    max-height:0;
    overflow:hidden;
    opacity:0;
    transform:translateY(-8px);
    background:linear-gradient(180deg,var(--night) 0%,#04121B 100%);
    border-bottom:1px solid rgba(79,163,209,.35);
    transition:max-height 220ms var(--ease),
               opacity 180ms var(--ease),
               transform 180ms var(--ease),
               visibility 0s linear 220ms;
  }
  .site-nav[data-open="true"]{
    visibility:visible;
    max-height:72vh;
    overflow-y:auto;
    opacity:1;
    transform:translateY(0);
    transition:max-height 220ms var(--ease),
               opacity 180ms var(--ease),
               transform 180ms var(--ease),
               visibility 0s;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding-block:8px 18px}
  .nav-list a{
    padding:14px 2px;
    font-size:16px;
    border-bottom:1px solid rgba(79,163,209,.16);
  }
  .nav-list li:last-child a{border-bottom:0}
  .nav-list a[aria-current="page"]{background:transparent;border-bottom-color:rgba(79,163,209,.16)}
  .nav-list a[aria-current="page"]::after{
    content:"";
    width:6px;
    height:6px;
    margin-left:auto;
    align-self:center;
    background:var(--orange);
    transform:rotate(45deg);
  }

  .layout-rail{grid-template-columns:minmax(0,1fr)}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px;padding-block:44px 32px}
  .footer-brand{grid-column:1 / -1}
  .contact-list{grid-template-columns:1fr 1fr}
}

@media (max-width:768px){
  body{font-size:16px;line-height:1.9}
  p{margin-bottom:20px}
  .section{padding-block:40px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .version-badge{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-heading{font-size:11.5px}
  .legal-list{margin-left:0;width:100%}
}

@media (max-width:560px){
  .shell{padding-inline:18px}
  .header-bar{min-height:60px}
  .brand-sub{display:none}
  .brand-label{font-size:15px}
  .brand-mark{font-size:13px;padding:7px 10px}
  .nav-toggle-label{display:none}
  .btn{padding:10px 13px;font-size:13px}
  .strip-tail{display:none}
  .strip-inner{font-size:10.5px;letter-spacing:.08em}
  .contact-list{grid-template-columns:minmax(0,1fr)}
  .footer-legal{font-size:11px;gap:8px 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;
    transition-delay:0s !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .scroll-fill{transition:none}
}