/* ============================================================
   欧宝体育官网 · /assets/site.css
   共享外壳：重置 / 设计令牌 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0B0D10;
  --ink-2:#14181E;
  --ink-3:#101C2E;
  --paper:#D8DCE2;
  --white:#F2F4F7;
  --blue:#2F6BFF;
  --cyan:#22E3D2;
  --amber:#E8A33D;
  --red:#D2543A;
  --mist:#7A8595;

  --line:rgba(216,220,226,.14);
  --line-2:rgba(216,220,226,.28);
  --line-3:rgba(216,220,226,.06);

  --f-head:"Barlow Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;
  --f-body:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --f-serif:"Noto Serif SC","Songti SC",STSong,Georgia,"Times New Roman",serif;
  --f-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.2,.8,.2,1);
  --dur-1:160ms;
  --dur-2:240ms;
  --dur-3:320ms;

  --shell:1440px;
  --gutter:clamp(16px,4vw,56px);
  --h-header:72px;
  --radius:2px;
  --gap:24px;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,video,svg{display:block;max-width:100%;height:auto;}
main{display:block;}
hr{border:0;}
strong,b{font-weight:700;}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:var(--radius);}
::selection{background:var(--blue);color:#fff;}

/* ---------- 3. 容器与基础排版 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(48px,7vw,96px);}
.rule{height:1px;background:var(--line);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--f-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.eyebrow::before{content:"";display:block;width:2px;height:14px;background:var(--amber);flex:0 0 auto;}

.headline{
  font-family:var(--f-head);
  font-weight:800;
  font-size:clamp(2.1rem,5.2vw,4.4rem);
  line-height:.98;
  letter-spacing:-.01em;
  color:var(--white);
}
.display{
  font-family:var(--f-serif);
  font-size:clamp(1.05rem,1.6vw,1.4rem);
  line-height:1.7;
  letter-spacing:.04em;
  color:var(--paper);
}
.lede{
  font-size:clamp(16px,1.5vw,17px);
  line-height:1.8;
  color:var(--paper);
  max-width:38ch;
}
.muted{color:var(--mist);}
.num{
  font-family:var(--f-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  color:var(--cyan);
}

/* ---------- 4. 通用按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--f-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background-color var(--dur-2) var(--ease),
             color var(--dur-2) var(--ease),
             border-color var(--dur-2) var(--ease),
             transform var(--dur-2) var(--ease);
}
.btn::before{
  content:"";
  position:absolute;
  inset-inline-start:0;
  top:0;
  bottom:0;
  width:3px;
  background:transparent;
  transform:skewX(-6deg);
  transition:background-color var(--dur-2) var(--ease);
}
.btn--primary{
  background:var(--blue);
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.1);
}
.btn--primary:hover{background:var(--cyan);color:var(--ink);transform:translate(2px,-2px);}
.btn--primary::before{background:var(--cyan);}
.btn--primary:hover::before{background:var(--ink);}
.btn--ghost{
  background:transparent;
  border-color:var(--line-2);
  color:var(--white);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translate(2px,-2px);}
.btn--sm{padding:8px 14px;font-size:13px;}

/* ---------- 5. 跳转链接与滚动进度 ---------- */
.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-80px;
  z-index:300;
  padding:10px 18px;
  background:var(--amber);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  border-radius:var(--radius);
  transition:top var(--dur-2) var(--ease);
}
.skip-link:focus{top:12px;}

.scroll-meter{
  position:fixed;
  inset-inline:0;
  top:0;
  height:2px;
  z-index:250;
  pointer-events:none;
  background:transparent;
}
.scroll-meter-bar{
  display:block;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue) 0%,var(--cyan) 58%,var(--amber) 100%);
  transition:transform 90ms linear;
}

/* ---------- 6. 品牌标识（头部与页脚共用） ---------- */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  border-radius:var(--radius);
}
.brand-mark{
  position:relative;
  flex:0 0 auto;
  width:36px;
  height:36px;
  clip-path:polygon(0 0,100% 0,100% 64%,64% 100%,0 100%);
  background:linear-gradient(148deg,var(--blue) 0%,#0d3ea8 56%,var(--cyan) 100%);
  transition:transform var(--dur-2) var(--ease);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:8px;
  right:13px;
  top:9px;
  bottom:9px;
  border-top:2px solid rgba(11,13,16,.92);
  border-bottom:2px solid rgba(11,13,16,.92);
  transform:skewX(-22deg);
}
.brand:hover .brand-mark{transform:translate(2px,-2px);}
.brand-text{display:grid;gap:1px;line-height:1.15;}
.brand-name{
  font-family:var(--f-head);
  font-weight:800;
  font-size:19px;
  letter-spacing:.04em;
  color:var(--white);
}
.brand-name em{font-style:normal;color:var(--cyan);}
.brand-sub{
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 7. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:200;
  background:rgba(11,13,16,.9);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background-color var(--dur-2) var(--ease),
             box-shadow var(--dur-2) var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width:min(380px,42%);
  height:2px;
  background:linear-gradient(90deg,var(--blue),var(--cyan) 70%,transparent);
  opacity:.85;
  pointer-events:none;
}
.site-header.is-pinned{
  background:rgba(11,13,16,.98);
  box-shadow:0 14px 34px rgba(0,0,0,.5);
}
.header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:var(--h-header);
  padding-block:10px;
}

/* 桌面导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:22px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-item{display:block;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.01em;
  color:rgba(216,220,226,.78);
  border-radius:var(--radius);
  transition:color var(--dur-1) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:3px;
  height:1px;
  background:var(--blue);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur-2) var(--ease),background-color var(--dur-2) var(--ease);
}
.nav-link:hover{color:var(--white);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--white);}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  height:2px;
  background:var(--cyan);
}
.nav-meta{
  display:flex;
  align-items:center;
  gap:12px;
  padding-left:20px;
  border-left:1px solid var(--line);
}
.nav-version{
  font-family:var(--f-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  padding:5px 8px;
  border:1px solid rgba(34,227,210,.34);
  border-radius:var(--radius);
  white-space:nowrap;
}

/* 移动开关 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  color:var(--paper);
  font-family:var(--f-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  transition:border-color var(--dur-2) var(--ease),color var(--dur-2) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  flex:0 0 auto;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur-2) var(--ease),opacity var(--dur-2) var(--ease);
}
.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{bottom:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(4.25px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-4.25px) rotate(-45deg);}

/* 遮罩 */
.nav-scrim{display:none;}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  background:var(--ink);
  border-top:1px solid var(--line-2);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-1px;
  height:3px;
  background:linear-gradient(90deg,var(--blue) 0%,var(--cyan) 38%,rgba(232,163,61,.7) 64%,transparent 88%);
  opacity:.8;
  pointer-events:none;
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,2fr);
  gap:clamp(28px,5vw,64px);
  padding-block:clamp(44px,6vw,76px) clamp(28px,4vw,44px);
}
.footer-brand{display:grid;gap:16px;align-content:start;}
.footer-note{
  font-size:13px;
  line-height:1.8;
  color:var(--mist);
  max-width:30ch;
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(14px,3vw,36px);
}
.footer-col{min-width:0;}
.footer-col-title{
  font-family:var(--f-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mist);
  padding-bottom:10px;
  margin-bottom:10px;
  border-bottom:1px solid var(--line);
}
.footer-links{display:grid;gap:1px;}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:rgba(216,220,226,.82);
  transition:color var(--dur-1) var(--ease),transform var(--dur-1) var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px);}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.footer-contact-cell{
  padding:16px clamp(0px,2vw,22px) 16px 0;
  min-width:0;
}
.footer-contact-cell dt{
  font-family:var(--f-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
  margin-bottom:4px;
}
.footer-contact-cell dd{
  margin:0;
  font-size:14px;
  line-height:1.6;
  color:var(--white);
  overflow-wrap:anywhere;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-block:20px 26px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-base-item{margin:0;}

/* ---------- 9. 通用组件 ---------- */
.card{
  position:relative;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  transition:transform var(--dur-2) var(--ease),
             border-color var(--dur-2) var(--ease),
             background-color var(--dur-2) var(--ease);
}
.card:hover{
  transform:translate(4px,-4px);
  border-color:var(--line-2);
  background:var(--ink-3);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 8px;
  border:1px solid rgba(34,227,210,.32);
  border-radius:var(--radius);
  font-family:var(--f-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  white-space:nowrap;
}
.tag--amber{color:var(--amber);border-color:rgba(232,163,61,.36);}
.tag--red{color:var(--red);border-color:rgba(210,84,58,.42);}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:20px 0;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb li + li::before{
  content:"/";
  margin-right:8px;
  color:var(--mist);
  opacity:.7;
}
.breadcrumb a{color:var(--paper);transition:color var(--dur-1) var(--ease);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--cyan);}

.trust-note{
  display:block;
  padding-left:14px;
  border-left:2px solid var(--amber);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.06em;
  color:var(--mist);
}

/* 可展开内容组 */
.expand-item{border-top:1px solid var(--line);}
.expand-item:last-child{border-bottom:1px solid var(--line);}
.expand-trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 4px;
  text-align:left;
  font-family:var(--f-head);
  font-weight:700;
  font-size:clamp(16px,2vw,19px);
  line-height:1.3;
  color:var(--white);
  border-radius:var(--radius);
  transition:color var(--dur-1) var(--ease);
}
.expand-trigger:hover{color:var(--cyan);}
.expand-sign{
  position:relative;
  flex:0 0 auto;
  width:16px;
  height:16px;
}
.expand-sign::before,
.expand-sign::after{
  content:"";
  position:absolute;
  inset:0;
  margin:auto;
  background:var(--cyan);
}
.expand-sign::before{width:14px;height:1.5px;}
.expand-sign::after{
  width:1.5px;
  height:14px;
  transition:transform var(--dur-2) var(--ease),opacity var(--dur-2) var(--ease);
}
.expand-trigger[aria-expanded="true"] .expand-sign::after{transform:rotate(90deg);opacity:0;}
.expand-panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows var(--dur-3) var(--ease);
}
.expand-panel.is-open{grid-template-rows:1fr;}
.expand-inner{overflow:hidden;min-height:0;}
.expand-body{
  padding:0 4px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--paper);
}

/* 图片容器基础规则 */
.figure{margin:0;display:grid;gap:10px;}
.figure-media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
  background:
    linear-gradient(135deg,rgba(47,107,255,.16),rgba(11,13,16,.94)),
    repeating-linear-gradient(115deg,rgba(216,220,226,.06) 0 1px,transparent 1px 26px),
    var(--ink-2);
}
.figure-media img,
.figure-media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-media[data-ratio="4/3"]{aspect-ratio:4/3;}
.figure-media[data-ratio="1/1"]{aspect-ratio:1/1;}
.figure-media[data-ratio="21/9"]{aspect-ratio:21/9;}
.figure-caption{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}

/* 栅格 */
.grid{display:grid;gap:var(--gap);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* 滚动显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 520ms var(--ease),transform 520ms var(--ease);
}
[data-reveal].is-inview{opacity:1;transform:none;}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1180px){
  .nav-link{padding:9px 8px;font-size:13.5px;}
  .nav-link::after{left:8px;right:8px;}
  .site-nav{gap:14px;}
  .nav-meta{padding-left:14px;gap:10px;}
}

@media (max-width:1024px){
  .footer-main{grid-template-columns:1fr;}
  .footer-note{max-width:44ch;}
  .grid--12{grid-template-columns:repeat(8,minmax(0,1fr));}
}

@media (max-width:960px){
  :root{--h-header:64px;}
  .nav-toggle{display:inline-flex;}
  .nav-scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:190;
    background:rgba(5,7,10,.74);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity var(--dur-2) var(--ease),visibility var(--dur-2) var(--ease);
  }
  .nav-scrim.is-active{opacity:1;visibility:visible;pointer-events:auto;}
  .site-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:195;
    width:min(360px,86vw);
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:calc(var(--h-header) + 22px) 22px 32px;
    background:linear-gradient(180deg,var(--ink-2) 0%,var(--ink) 100%);
    border-left:1px solid var(--line-2);
    box-shadow:-24px 0 60px rgba(0,0,0,.55);
    transform:translateX(102%);
    transition:transform var(--dur-3) var(--ease);
    overflow-y:auto;
    overscroll-behavior:contain;
  }
  .site-nav[data-open="true"]{transform:translateX(0);}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{border-bottom:1px solid var(--line);}
  .nav-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:16px 2px;
    font-size:17px;
    font-weight:600;
    color:var(--paper);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--cyan);}
  .nav-link[aria-current="page"]::before{
    content:"";
    display:block;
    width:6px;
    height:6px;
    margin-left:auto;
    margin-right:6px;
    background:var(--cyan);
    transform:rotate(45deg);
    flex:0 0 auto;
    order:0;
  }
  .nav-meta{
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    margin-top:24px;
    padding-top:20px;
    padding-left:0;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .nav-version{align-self:flex-start;}
  .nav-meta .btn{width:100%;}
  .grid--12{grid-template-columns:repeat(8,minmax(0,1fr));}
}

@media (max-width:720px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .footer-contact-cell{padding-block:14px;}
  .footer-base{justify-content:flex-start;gap:8px 20px;}
  .grid--12{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:520px){
  .brand-name{font-size:17px;}
  .brand-sub{font-size:9px;letter-spacing:.12em;}
  .brand-mark{width:32px;height:32px;}
  .footer-cols{grid-template-columns:minmax(0,1fr);}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .card:hover,.btn:hover{transform:none;}
  .scroll-meter-bar{transition:none;}
}

/* ---------- 12. 主内容锚点 ---------- */
#main-content{scroll-margin-top:calc(var(--h-header) + 16px);}