/* =========================================================
   大嬴体育登录 · 共享样式 /assets/site.css
   ink 近单色基底 + 电光青交互 + 荧光橙数据高亮
   ========================================================= */

:root{
  /* 色彩 */
  --ink-950:#06111D;
  --ink-900:#0A1B2B;
  --ink-800:#10283D;
  --ink-700:#173750;
  --steel-500:#708090;
  --steel-300:#A9B7C6;
  --mist-100:#EAF4F8;
  --cyan-400:#36E0FF;
  --cyan-600:#0E9FBE;
  --orange-500:#FF7A2F;
  --orange-300:#FFB07A;
  --line-600:#284B66;

  /* 字体 */
  --font-head:"Barlow Condensed","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Consolas,monospace;

  /* 尺度 */
  --wrap:1240px;
  --gutter:clamp(16px,3.6vw,44px);
  --header-h:84px;
  --ease:cubic-bezier(.22,.61,.36,1);

  /* 由 JS 写入 */
  --scroll-progress:0;
}

@media (max-width:1100px){
  :root{--header-h:64px;}
}

/* ---------- reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  padding-top:var(--header-h);
  background:
    radial-gradient(1200px 520px at 84% -10%, rgba(14,159,190,.16), transparent 62%),
    radial-gradient(900px 460px at 6% 4%, rgba(255,122,47,.07), transparent 60%),
    var(--ink-900);
  color:var(--mist-100);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.012em;
  color:var(--mist-100);
  text-wrap:balance;
}

p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

img,
svg,
video{
  display:block;
  max-width:100%;
  height:auto;
}

a{
  color:var(--cyan-400);
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}

strong{font-weight:600;color:var(--mist-100);}

::selection{background:var(--cyan-400);color:var(--ink-950);}

/* ---------- 焦点与可访问性 ---------- */
:focus-visible{
  outline:2px solid var(--cyan-400);
  outline-offset:3px;
  border-radius:1px;
}
:focus:not(:focus-visible){outline:none;}

#main-content{scroll-margin-top:calc(var(--header-h) + 16px);}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  transform:translateY(-220%);
  padding:10px 18px;
  background:var(--cyan-400);
  color:var(--ink-950);
  font-family:var(--font-head);
  font-size:14px;
  font-weight:700;
  letter-spacing:.1em;
  text-decoration:none;
  transition:transform .2s var(--ease);
}
.skip-link:focus{
  transform:translateY(0);
  outline:2px solid var(--mist-100);
  outline-offset:2px;
}

/* =========================================================
   框架式页头
   ========================================================= */
.site-header{
  position:fixed;
  top:0;
  right:0;
  left:0;
  z-index:100;
  background:linear-gradient(180deg, rgba(6,17,29,.985) 0%, rgba(10,27,43,.94) 100%);
  border-bottom:1px solid var(--line-600);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

/* L 形边框立柱 */
.site-header::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  width:3px;
  background:linear-gradient(180deg, var(--cyan-400) 0%, var(--cyan-600) 56%, rgba(14,159,190,0) 100%);
  pointer-events:none;
}

/* 滚动进度线 */
.site-header::after{
  content:"";
  position:absolute;
  right:0;
  bottom:-1px;
  left:0;
  height:2px;
  background:linear-gradient(90deg, var(--cyan-400) 0%, var(--cyan-600) 62%, var(--orange-500) 100%);
  transform:scaleX(var(--scroll-progress));
  transform-origin:left center;
  opacity:.92;
  pointer-events:none;
}

.site-header__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  max-width:var(--wrap);
  height:var(--header-h);
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ---------- 品牌 ---------- */
.brand{
  display:flex;
  flex:0 0 auto;
  align-items:center;
  gap:12px;
  padding:6px 0;
  color:inherit;
  text-decoration:none;
}

.brand__mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  background:var(--cyan-400);
  color:var(--ink-950);
  font-family:var(--font-head);
  font-size:21px;
  font-weight:800;
  line-height:1;
  letter-spacing:0;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
  transition:background .2s var(--ease), color .2s var(--ease);
}

.brand:hover .brand__mark{
  background:var(--orange-500);
  color:var(--ink-950);
}

.brand__text{
  display:flex;
  flex-direction:column;
  gap:3px;
  line-height:1.05;
}

.brand__name{
  font-family:var(--font-head);
  font-size:19px;
  font-weight:800;
  letter-spacing:.04em;
  color:var(--mist-100);
  white-space:nowrap;
}

.brand__meta{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--steel-500);
  white-space:nowrap;
}

/* ---------- 移动按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:8px 12px;
  border:1px solid var(--line-600);
  background:transparent;
  color:var(--mist-100);
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}
.nav-toggle:hover{
  border-color:var(--cyan-400);
  color:var(--cyan-400);
  background:rgba(54,224,255,.08);
}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .22s var(--ease), top .22s var(--ease);
}
.nav-toggle__bars::before{top:0;}
.nav-toggle__bars::after{top:8px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:4px;transform:rotate(-45deg);}

/* ---------- 导航 ---------- */
.site-nav{
  display:flex;
  flex:1 1 auto;
  justify-content:center;
  margin:0;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:navidx;
}
.nav-list li{counter-increment:navidx;}

.nav-list a{
  position:relative;
  display:block;
  padding:9px 13px;
  border:1px solid transparent;
  color:var(--steel-300);
  font-family:var(--font-head);
  font-size:15px;
  font-weight:600;
  letter-spacing:.07em;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.nav-list a::before{
  content:counter(navidx,decimal-leading-zero);
  margin-right:7px;
  color:var(--steel-500);
  font-family:var(--font-mono);
  font-size:9px;
  font-weight:400;
  letter-spacing:.08em;
  vertical-align:2px;
  transition:color .18s var(--ease);
}

.nav-list a::after{
  content:"";
  position:absolute;
  right:13px;
  bottom:3px;
  left:13px;
  height:1px;
  background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}

.nav-list a:hover{
  color:var(--mist-100);
  border-color:rgba(54,224,255,.3);
  background:linear-gradient(135deg, rgba(54,224,255,.15) 0%, rgba(54,224,255,0) 74%);
}
.nav-list a:hover::after{transform:scaleX(1);}

.nav-list a[aria-current="page"]{
  color:var(--cyan-400);
  border-color:rgba(54,224,255,.38);
  background:rgba(54,224,255,.08);
}
.nav-list a[aria-current="page"]::before{color:var(--orange-500);}
.nav-list a[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--orange-500);
}

/* ---------- 头部按钮 ---------- */
.header-actions{
  display:flex;
  flex:0 0 auto;
  align-items:center;
  gap:10px;
  margin-left:auto;
}

.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 20px;
  border:1px solid transparent;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:700;
  letter-spacing:.1em;
  line-height:1.2;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

.btn--primary{
  background:var(--cyan-400);
  border-color:var(--cyan-400);
  color:var(--ink-950);
}
.btn--primary::after{
  content:"";
  position:absolute;
  top:-1px;
  right:-1px;
  width:11px;
  height:11px;
  background:var(--ink-950);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.btn--primary:hover{
  background:var(--mist-100);
  border-color:var(--mist-100);
  color:var(--ink-950);
  transform:translateY(-1px);
}

.btn--ghost{
  background:transparent;
  border-color:var(--line-600);
  color:var(--steel-300);
}
.btn--ghost:hover{
  border-color:var(--cyan-400);
  background:rgba(54,224,255,.1);
  color:var(--cyan-400);
  transform:translateY(-1px);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:linear-gradient(180deg, var(--ink-950) 0%, #040C15 100%);
  border-top:1px solid var(--line-600);
  color:var(--steel-300);
  font-size:14px;
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  left:0;
  height:3px;
  background:repeating-linear-gradient(90deg,
      var(--cyan-400) 0 2px,
      transparent 2px 26px,
      var(--orange-500) 26px 28px,
      transparent 28px 96px);
  opacity:.32;
  pointer-events:none;
}

.site-footer__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(40px,6vw,74px) var(--gutter) 0;
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1.15fr) minmax(0,2fr);
  gap:clamp(28px,4.5vw,64px);
}

.footer-brand__link{
  display:inline-flex;
  align-items:center;
  gap:11px;
  color:var(--mist-100);
  text-decoration:none;
}
.footer-brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--line-600);
  background:var(--ink-800);
  color:var(--cyan-400);
  font-family:var(--font-head);
  font-size:16px;
  font-weight:800;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
  transition:color .2s var(--ease), border-color .2s var(--ease);
}
.footer-brand__link:hover .footer-brand__mark{
  border-color:var(--orange-500);
  color:var(--orange-500);
}
.footer-brand__name{
  font-family:var(--font-head);
  font-size:18px;
  font-weight:800;
  letter-spacing:.04em;
}
.footer-brand__tag{
  max-width:36ch;
  margin:16px 0 16px;
  color:var(--steel-500);
  font-size:13px;
  line-height:1.75;
}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
}

.footer-col__title{
  margin:0 0 14px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(40,75,102,.6);
  color:var(--mist-100);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
}

.footer-col__links{
  margin:0;
  padding:0;
  list-style:none;
}
.footer-col__links li + li{margin-top:2px;}
.footer-col__links a{
  display:inline-block;
  padding:5px 0;
  color:var(--steel-300);
  font-size:14px;
  text-decoration:none;
  transition:color .18s var(--ease), transform .18s var(--ease);
}
.footer-col__links a:hover{
  color:var(--cyan-400);
  transform:translateX(3px);
}

.footer-contact{
  display:grid;
  grid-template-columns:minmax(0,180px) minmax(0,1fr);
  gap:16px clamp(24px,4vw,48px);
  margin-top:clamp(30px,4.5vw,50px);
  padding-top:clamp(22px,3vw,30px);
  border-top:1px solid rgba(40,75,102,.6);
}
.footer-contact .footer-col__title{
  margin:0;
  padding-bottom:0;
  border-bottom:0;
}

.contact-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:16px clamp(20px,3vw,36px);
  margin:0;
}
.contact-list__item{
  display:grid;
  grid-template-columns:78px minmax(0,1fr);
  gap:10px;
  font-size:13px;
  line-height:1.6;
}
.contact-list__item dt{
  padding-top:2px;
  color:var(--steel-500);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.contact-list__item dd{
  margin:0;
  color:var(--mist-100);
  overflow-wrap:anywhere;
}

.footer-contact__note{
  grid-column:2 / 3;
  margin:0;
  max-width:62ch;
  color:var(--steel-500);
  font-size:12.5px;
  line-height:1.75;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:clamp(28px,4vw,48px);
  padding:18px 0 30px;
  border-top:1px solid rgba(40,75,102,.55);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--steel-500);
}
.footer-legal{margin:0;}

.footer-legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-legal-links a{
  color:var(--steel-500);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.footer-legal-links a:hover{color:var(--cyan-400);}

/* =========================================================
   通用布局与组件
   ========================================================= */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.rule{
  height:1px;
  margin:clamp(28px,4vw,56px) 0;
  border:0;
  background:var(--line-600);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--cyan-400);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.26em;
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:20px;
  height:1px;
  background:currentColor;
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 32px;
  margin-bottom:clamp(20px,3vw,36px);
  padding-bottom:16px;
  border-bottom:1px solid var(--line-600);
}
.section-head__title{
  font-size:clamp(28px,4vw,44px);
  letter-spacing:-.018em;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-600);
  border-radius:2px;
  background:rgba(54,224,255,.07);
  color:var(--steel-300);
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.7;
}
.tag--accent{
  border-color:rgba(255,122,47,.5);
  background:rgba(255,122,47,.1);
  color:var(--orange-300);
}

.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:500;
  letter-spacing:-.02em;
  color:var(--orange-500);
}

.surface{
  background:var(--ink-800);
  border:1px solid var(--line-600);
  padding:clamp(20px,3vw,32px);
  transition:border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.surface:hover{
  border-color:var(--cyan-600);
  background:var(--ink-700);
  transform:translateY(-2px);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin:0;
  padding:22px 0 6px;
  list-style:none;
  color:var(--steel-500);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.breadcrumb li{display:flex;align-items:center;}
.breadcrumb li + li::before{
  content:"/";
  margin:0 9px;
  color:var(--line-600);
}
.breadcrumb a{
  color:var(--steel-300);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.breadcrumb a:hover{color:var(--cyan-400);}
.breadcrumb [aria-current="page"]{color:var(--cyan-400);}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}

/* 图片容器基础规则：页面阶段直接放入 <img> 即可 */
.media-frame{
  position:relative;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--line-600);
  background:
    linear-gradient(135deg, var(--ink-700) 0%, var(--ink-950) 70%),
    var(--ink-950);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
  filter:saturate(.92) contrast(1.05);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(6,17,29,0) 42%, rgba(6,17,29,.78) 100%);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%);}

/* 显现（无 JS 时保持可见） */
html[data-reveal] .reveal{
  opacity:0;
  transform:translateY(14px);
}
html[data-reveal] .reveal.is-visible{
  opacity:1;
  transform:none;
  transition:opacity .55s var(--ease), transform .55s var(--ease);
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1100px){
  .nav-toggle{display:inline-flex;}

  .site-header::before{width:2px;}

  .site-nav{
    position:absolute;
    top:var(--header-h);
    right:0;
    left:0;
    display:none;
    flex:none;
    justify-content:flex-start;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:8px var(--gutter) 18px;
    background:var(--ink-950);
    border-top:1px solid var(--line-600);
    border-bottom:1px solid var(--line-600);
    box-shadow:0 24px 40px rgba(3,9,16,.6);
  }
  .site-nav[data-open="true"]{display:block;}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list a{
    padding:14px 12px;
    border-bottom:1px solid rgba(40,75,102,.45);
    font-size:16px;
    letter-spacing:.1em;
  }
  .nav-list a::after{display:none;}
  .nav-list a:hover{background:linear-gradient(135deg, rgba(54,224,255,.14) 0%, rgba(54,224,255,0) 88%);}

  .header-actions{gap:8px;}
  .header-actions .btn--ghost{display:none;}

  .footer-top{grid-template-columns:1fr;}
  .footer-nav{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-contact{grid-template-columns:1fr;}
  .footer-contact__note{grid-column:auto;}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
}

@media (max-width:900px){
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));}
  .site-footer{margin-top:clamp(52px,8vw,88px);}
}

@media (max-width:560px){
  .brand__mark{width:36px;height:36px;font-size:17px;}
  .brand__name{font-size:16px;letter-spacing:.02em;}
  .brand__meta{display:none;}
  .brand{gap:9px;}

  .nav-toggle{padding:7px 9px;gap:0;}
  .nav-toggle__label{display:none;}

  .header-actions .btn--primary{
    padding:9px 12px;
    font-size:12px;
    letter-spacing:.06em;
  }

  .footer-nav{grid-template-columns:1fr;gap:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .contact-list__item{grid-template-columns:1fr;gap:2px;}
  .contact-list__item dt{padding-top:0;}

  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .media-frame--cut{clip-path:none;}
}

@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;
  }
  html[data-reveal] .reveal,
  html[data-reveal] .reveal.is-visible{
    opacity:1;
    transform:none;
  }
  .site-header::after{opacity:.5;}
}