/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
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,picture{display:block;max-width:100%;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
strong,b{font-weight:800;}

/* ============ tokens ============ */
:root{
  --ink:#0B1020;
  --ink-soft:#0E1426;
  --panel:#1A2236;
  --white:#FFFFFF;
  --silver:#F2F4F7;
  --brand:#FF4B1F;
  --brand-hi:#FF8A3D;
  --blue:#2B4C9B;
  --cyan:#22E0D6;
  --metal:#A7B0BE;
  --amber:#FFB020;
  --line:rgba(167,176,190,.20);
  --line-strong:rgba(167,176,190,.42);
  --shadow:0 10px 30px rgba(3,6,16,.48);
  --shadow-hi:0 16px 38px rgba(3,6,16,.6);
  --font-head:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,monospace;
  --wrap:1280px;
  --radius:12px;
  --cut:14px;
  --header-h:116px;
}

/* ============ base ============ */
body{
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
p{text-wrap:pretty;}
::selection{background:var(--brand);color:var(--ink);}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px;}
[id]{scroll-margin-top:calc(var(--header-h) + 18px);}
#main-content{display:block;}

/* ============ skip link & frame ============ */
.skip-link{
  position:fixed;
  left:14px;
  top:-70px;
  z-index:200;
  background:var(--brand);
  color:var(--ink);
  font-family:var(--font-head);
  font-weight:800;
  font-size:14px;
  padding:10px 18px;
  border-radius:0 0 8px 8px;
  transition:top .18s ease;
}
.skip-link:focus{top:0;}
.frame-rail{
  display:none;
  position:fixed;
  left:0;top:0;bottom:0;
  width:14px;
  z-index:60;
  pointer-events:none;
  border-right:1px solid var(--line);
  background-image:repeating-linear-gradient(to bottom,var(--line-strong) 0 1px,transparent 1px 46px);
}
@media (min-width:1440px){.frame-rail{display:block;}}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--ink);
  border-bottom:1px solid var(--line-strong);
  box-shadow:0 12px 30px rgba(3,6,16,.5);
}
.site-header__inner{
  position:relative;
  max-width:var(--wrap);
  margin:0 auto;
  padding:14px 20px;
  display:flex;
  align-items:center;
  gap:20px;
}
.brand{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
  flex:0 0 auto;
}
.brand__mark{
  display:inline-block;
  font-family:var(--font-head);
  font-weight:900;
  font-size:20px;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--white);
  transform:skewX(-3deg);
  transition:color .16s ease;
}
.brand__mark::before{
  content:"";
  display:inline-block;
  width:7px;height:15px;
  margin-right:9px;
  background:var(--brand);
  transform:skewX(-12deg) translateY(2px);
}
.brand:hover .brand__mark{color:var(--brand-hi);}
.brand__tag{
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--metal);
  line-height:1.3;
}
.brand--footer .brand__mark{font-size:23px;}
.brand--footer .brand__tag{letter-spacing:.1em;}

.main-nav{flex:1 1 auto;min-width:0;}
.main-nav__list{display:flex;flex-wrap:wrap;gap:2px;}
.main-nav__item{flex:0 0 auto;}
.main-nav__link{
  display:block;
  padding:8px 12px;
  font-size:14px;
  font-weight:600;
  color:var(--metal);
  border:1px solid transparent;
  border-radius:6px;
  white-space:nowrap;
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.main-nav__link:hover{color:var(--white);background:rgba(255,255,255,.05);}
.main-nav__link[aria-current="page"]{
  color:var(--white);
  border-color:var(--brand);
  background:rgba(255,75,31,.12);
}

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

/* ============ chips & buttons ============ */
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 12px;
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:999px;
  color:var(--metal);
  font-size:12px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:color .16s ease,border-color .16s ease;
}
.chip__dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--metal);
  transition:background-color .16s ease,box-shadow .16s ease;
}
.chip:hover{color:var(--white);border-color:var(--brand-hi);}
.chip[aria-pressed="true"]{color:var(--cyan);border-color:rgba(34,224,214,.6);}
.chip[aria-pressed="true"] .chip__dot{background:var(--cyan);box-shadow:0 0 0 3px rgba(34,224,214,.18);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid transparent;
  border-radius:8px;
  font-family:var(--font-head);
  font-weight:800;
  font-size:13px;
  line-height:1.2;
  letter-spacing:.01em;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .16s ease,background-color .16s ease,border-color .16s ease,color .16s ease,box-shadow .16s ease;
}
.btn--brand{background:var(--brand);color:var(--ink);box-shadow:0 6px 18px rgba(255,75,31,.24);}
.btn--brand:hover{background:var(--brand-hi);transform:translateY(-2px);}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px);}
.btn-group{display:flex;flex-wrap:wrap;gap:10px;}

/* ============ nav toggle ============ */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  background:var(--panel);
  border:1px solid var(--line-strong);
  border-radius:8px;
  color:var(--white);
  font-family:var(--font-head);
  font-weight:700;
  font-size:13px;
  cursor:pointer;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:var(--brand);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg);}

/* ============ league bar ============ */
.league-bar{
  position:relative;
  background:var(--ink-soft);
  border-top:1px solid var(--line);
}
.league-bar__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 20px;
  height:48px;
  display:flex;
  align-items:center;
  gap:14px;
}
.league-bar__label{
  flex:0 0 auto;
  padding-right:12px;
  border-right:1px solid var(--line-strong);
  font-size:12px;
  font-weight:800;
  line-height:1;
  letter-spacing:.14em;
  color:var(--brand);
}
.league-bar__list{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  gap:6px;
  overflow-x:auto;
  padding:4px 2px;
  scrollbar-width:none;
}
.league-bar__list::-webkit-scrollbar{display:none;}
.league-chip{
  flex:0 0 auto;
  padding:5px 11px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--metal);
  font-size:12px;
  font-weight:700;
  white-space:nowrap;
  cursor:pointer;
  transition:color .16s ease,border-color .16s ease,background-color .16s ease,box-shadow .16s ease;
}
.league-chip:hover{color:var(--white);border-color:var(--metal);}
.league-chip[aria-pressed="true"]{
  background:var(--brand);
  border-color:var(--brand);
  color:var(--ink);
  box-shadow:0 4px 14px rgba(255,75,31,.3);
}
.league-bar__meta{
  flex:0 0 auto;
  padding-left:12px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1;
  font-variant-numeric:tabular-nums;
  color:var(--metal);
  white-space:nowrap;
}
.league-bar__progress{
  display:block;
  width:100%;
  height:2px;
  background:rgba(167,176,190,.16);
}
.league-bar__progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--brand),var(--brand-hi));
  transition:width .08s linear;
}

/* ============ footer ============ */
.site-footer{
  margin-top:80px;
  border-top:1px solid var(--line-strong);
  background:linear-gradient(180deg,rgba(26,34,54,.85),rgba(11,16,32,1));
}
.site-footer__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:52px 20px 30px;
  display:grid;
  grid-template-columns:1.6fr repeat(4,minmax(0,1fr));
  gap:34px 26px;
}
.site-footer__lead{display:flex;flex-direction:column;gap:14px;}
.site-footer__note{font-size:13.5px;line-height:1.8;color:var(--metal);max-width:34ch;}
.footer-col__title{
  position:relative;
  padding-left:12px;
  margin-bottom:14px;
  font-size:13px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--white);
}
.footer-col__title::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:6px;height:2px;
  background:var(--brand);
}
.footer-col__list li + li{margin-top:10px;}
.footer-col__list a{
  font-size:13.5px;
  color:var(--metal);
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-col__list a:hover{color:var(--cyan);border-color:var(--cyan);}
.site-footer__base{
  max-width:var(--wrap);
  margin:0 auto;
  padding:22px 20px 36px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  justify-content:space-between;
  font-size:12.5px;
  line-height:1.7;
  color:var(--metal);
}
.site-footer__contact{font-family:var(--font-mono);font-size:12px;}
.site-footer__legal{display:flex;flex-wrap:wrap;gap:18px;}
.site-footer__legal a{border-bottom:1px solid var(--line-strong);padding-bottom:2px;transition:color .16s ease,border-color .16s ease;}
.site-footer__legal a:hover{color:var(--cyan);border-color:var(--cyan);}
.site-footer__addr{font-size:12.5px;}
.site-footer__copy{font-size:12.5px;}

/* ============ layout utilities ============ */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px;}
.stack{display:flex;flex-direction:column;gap:16px;}
.stack--lg{gap:28px;}
.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));}
.grid--asym{grid-template-columns:minmax(240px,.9fr) minmax(0,1.8fr);}
.tilt{transform:skewX(-3deg);}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}

/* ============ typography blocks ============ */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--metal);
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--metal);}
.eyebrow--data{color:var(--cyan);}
.eyebrow--data::before{background:var(--cyan);}
.section-title{
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(26px,3vw,40px);
  line-height:1.18;
  letter-spacing:-.02em;
  color:var(--white);
}
.section-mark{
  position:relative;
  padding-left:18px;
  transition:color .16s ease;
}
.section-mark::before{
  content:"";
  position:absolute;
  left:0;top:.5em;
  width:2px;height:1em;
  background:var(--line-strong);
  transition:background-color .16s ease,height .16s ease;
}
.section-mark.is-active::before{background:var(--brand);height:1.4em;}
.lead{
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;
  color:#DDE3EC;
  max-width:60ch;
}
.prose{max-width:68ch;font-size:15.5px;line-height:1.85;color:#D8DEE9;}
.prose p + p{margin-top:1.25em;}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(34,224,214,.45);}
.prose a:hover{border-color:var(--cyan);}
.rule{height:1px;border:0;background:var(--line);margin:32px 0;}
.rule--ticks{
  height:9px;
  border:0;
  margin:32px 0;
  background-color:transparent;
  background-image:repeating-linear-gradient(to right,var(--line-strong) 0 1px,transparent 1px 12px);
}

/* ============ components ============ */
.card{
  position:relative;
  padding:22px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 8px 24px rgba(3,6,16,.4);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hi);}
.card__head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;}
.card__title{font-family:var(--font-head);font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--white);}
.card__body{font-size:14.5px;line-height:1.8;color:var(--metal);}
.card__foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--metal);}
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(255,255,255,.03);
  color:var(--metal);
  font-size:12px;
  font-weight:700;
  line-height:1.6;
}
.badge--cyan{color:var(--cyan);border-color:rgba(34,224,214,.5);}
.badge--amber{color:var(--amber);border-color:rgba(255,176,32,.5);}
.tag{
  display:inline-block;
  padding:4px 10px;
  border:1px solid rgba(43,76,155,.6);
  border-radius:6px;
  background:rgba(43,76,155,.35);
  color:#C9D6F5;
  font-size:12px;
  font-weight:600;
}
.stat{border-left:2px solid var(--brand);padding-left:14px;}
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(26px,3vw,38px);
  line-height:1.1;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  color:var(--white);
}
.stat__unit{font-size:.5em;font-weight:500;color:var(--metal);margin-left:3px;}
.stat__label{margin-top:6px;font-size:12.5px;letter-spacing:.04em;color:var(--metal);}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--metal);
}
.breadcrumb__item::after{content:"/";margin-left:8px;color:rgba(167,176,190,.5);}
.breadcrumb__item:last-child::after{content:"";}
.breadcrumb a:hover{color:var(--cyan);}
.index-list{border-top:1px solid var(--line);}
.index-list__item{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:12px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .16s ease,padding-left .16s ease;
}
.index-list__item:hover{background:rgba(255,255,255,.03);padding-left:10px;}

/* ============ media frame ============ */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(43,76,155,.4),rgba(11,16,32,.92) 58%),
    var(--panel);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame img{width:100%;height:100%;object-fit:cover;position:relative;z-index:1;}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:linear-gradient(115deg,transparent 40%,rgba(34,224,214,.16) 45%,transparent 50%,transparent 62%,rgba(255,75,31,.14) 66%,transparent 72%);
}
.media-frame:not(:has(img))::after{
  content:"图片占位";
  position:absolute;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--metal);
}
.media-frame__caption{
  position:absolute;
  left:12px;right:12px;bottom:12px;
  z-index:3;
  padding:6px 10px;
  border-left:2px solid var(--cyan);
  border-radius:6px;
  background:rgba(11,16,32,.72);
  color:var(--metal);
  font-size:12px;
  line-height:1.6;
}

/* ============ reveal & motion ============ */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
.js-ready [data-reveal].is-in{opacity:1;transform:none;}

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

/* ============ responsive ============ */
@media (max-width:1280px){
  .header-tools__ghost{display:none;}
  .main-nav__link{padding:8px 9px;font-size:13.5px;}
}
@media (max-width:1080px){
  .site-header__inner{flex-wrap:wrap;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    display:none;
    position:absolute;
    left:0;right:0;top:100%;
    flex:0 0 auto;
    padding:12px 20px 20px;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line-strong);
    box-shadow:var(--shadow);
    z-index:95;
  }
  .main-nav[data-open]{display:block;animation:navIn .18s ease;}
  .main-nav__list{flex-direction:column;gap:0;}
  .main-nav__item{flex:1 1 auto;}
  .main-nav__link{
    display:flex;
    justify-content:space-between;
    padding:13px 10px;
    font-size:15px;
    border-bottom:1px solid var(--line);
    border-radius:0;
  }
  .main-nav__link[aria-current="page"]{border-color:var(--brand);border-radius:6px;}
  .league-bar__meta{display:none;}
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr));}
  .site-footer__lead{grid-column:1 / -1;}
  .grid--asym{grid-template-columns:minmax(0,1fr);}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@keyframes navIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:none;}}
@media (max-width:900px){
  .grid--2{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:720px){
  body{font-size:15.5px;}
  .site-header__inner{padding:12px 16px;gap:12px;}
  .league-bar__inner{padding:0 16px;gap:10px;}
  .league-bar__label{letter-spacing:.08em;font-size:11px;padding-right:9px;}
  .wrap{padding:0 16px;}
  .grid--3{grid-template-columns:minmax(0,1fr);}
  .site-footer__inner{grid-template-columns:minmax(0,1fr);padding:40px 16px 24px;gap:26px;}
  .site-footer__base{padding:20px 16px 32px;flex-direction:column;align-items:flex-start;gap:12px;}
  .site-footer__contact{font-size:11.5px;word-break:break-all;}
  .btn{padding:9px 13px;font-size:12.5px;}
  .chip{padding:6px 10px;}
  .nav-toggle__text{display:none;}
}