/* =========================================================
   欧宝赛场 · 共享样式表 /assets/site.css
   深夜赛事控制室 + 看台灯光：切角面板、斜线轨迹、等宽数字
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --deep-sea:#061426;
  --night-blue:#0C2340;
  --steel:#1B3A5C;
  --cyan:#2CE5D2;
  --orange:#FF6B22;
  --amber:#FFC44D;
  --ice:#ECF5FF;
  --mist:#93AECB;
  --teal-deep:#0A3F3B;
  --coral:#FF5C6E;

  --font-body:"Source Han Sans SC","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-display:var(--font-body);
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell-w:1280px;
  --gutter:clamp(16px,4vw,40px);
  --cut:14px;
  --cut-sm:9px;
  --cut-path:polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  --cut-path-sm:polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
}

/* ---------- 2. 重置 ---------- */
*,*::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,hr{ margin:0; padding:0; }
ul,ol{ list-style:none; }
img,svg,video{ display:block; max-width:100%; height:auto; }
button,input,select,textarea{ font:inherit; color:inherit; }
a{ color:var(--cyan); text-decoration-thickness:1px; text-underline-offset:3px; }
table{ border-collapse:collapse; }
hr{ border:0; }

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--deep-sea);
  background-image:
    linear-gradient(rgba(27,58,92,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,58,92,.14) 1px, transparent 1px);
  background-size:72px 72px, 72px 72px;
  background-attachment:fixed;
  color:var(--ice);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:800; line-height:1.2; letter-spacing:-.01em; color:var(--ice); }
h2{ font-size:clamp(22px,3vw,34px); }
h3{ font-size:clamp(18px,2vw,24px); }
p{ max-width:42em; }
strong{ color:var(--amber); font-weight:700; }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  box-shadow:0 0 0 6px rgba(44,229,210,.16);
  border-radius:2px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:50%;
  top:0;
  z-index:120;
  transform:translate(-50%,-160%);
  padding:10px 20px;
  background:var(--cyan);
  color:var(--deep-sea);
  font-size:12px;
  font-weight:800;
  letter-spacing:.16em;
  text-decoration:none;
  clip-path:var(--cut-path-sm);
  transition:transform 180ms ease;
}
.skip-link:focus{ transform:translate(-50%,0); }

/* ---------- 5. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg, rgba(6,20,38,.98) 0%, rgba(6,20,38,.93) 100%);
  border-bottom:1px solid var(--steel);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:-1px;
  height:2px;
  background:linear-gradient(90deg, transparent 0%, rgba(44,229,210,.55) 30%, rgba(255,107,34,.45) 62%, transparent 100%);
  pointer-events:none;
}

.site-header__track{
  display:flex;
  align-items:center;
  gap:12px;
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
  padding-block:8px 2px;
  transition:opacity 200ms ease;
}
.site-header__track-label{
  font-size:10px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--mist);
  white-space:nowrap;
}
.site-header__track-rule{
  flex:1;
  height:7px;
  border-top:1px solid rgba(27,58,92,.9);
  background-image:
    repeating-linear-gradient(90deg, rgba(27,58,92,1) 0 1px, transparent 1px 14px),
    linear-gradient(90deg, rgba(44,229,210,.45) 0%, rgba(255,107,34,.28) 55%, transparent 92%);
  background-repeat:repeat-x, no-repeat;
  background-size:14px 100%, 100% 100%;
  opacity:.9;
}

.site-header__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
  padding-block:18px 14px;
  transition:padding 200ms ease;
}

.masthead{ text-align:center; min-width:0; }
.masthead__brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ice);
  text-decoration:none;
}
.masthead__glyph{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  flex:none;
  background:linear-gradient(135deg, var(--cyan) 0%, #12b7a8 100%);
  color:var(--deep-sea);
  font-size:19px;
  font-weight:900;
  line-height:1;
  clip-path:polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition:transform 180ms ease;
}
.masthead__brand:hover .masthead__glyph,
.masthead__brand:focus-visible .masthead__glyph{ transform:translateY(-2px); }
.masthead__name{
  font-size:clamp(20px,2.6vw,30px);
  font-weight:900;
  letter-spacing:.04em;
  transition:font-size 200ms ease;
}
.masthead__tagline{
  max-height:26px;
  overflow:hidden;
  margin-top:2px;
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
  transition:max-height 200ms ease, opacity 200ms ease;
}

.masthead__meta{
  display:flex;
  align-items:baseline;
  gap:7px;
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
  min-width:0;
}
.masthead__meta-v{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  font-weight:700;
  letter-spacing:0;
  color:var(--amber);
}

.site-header__tools{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
}

/* 滚动收缩态 */
.site-header[data-scrolled="true"] .site-header__inner{ padding-block:9px 8px; }
.site-header[data-scrolled="true"] .masthead__tagline{ max-height:0; opacity:0; }
.site-header[data-scrolled="true"] .masthead__name{ font-size:clamp(18px,2.2vw,24px); }
.site-header[data-scrolled="true"] .site-header__track{ opacity:.45; }

/* ---------- 6. 导航 ---------- */
.site-nav{
  border-top:1px solid rgba(27,58,92,.9);
  background:linear-gradient(180deg, rgba(12,35,64,.55), rgba(6,20,38,0));
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(4px,2.4vw,26px);
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
}
.site-nav__list a{
  position:relative;
  display:block;
  padding:13px 6px 15px;
  color:var(--mist);
  font-size:14px;
  letter-spacing:.16em;
  text-decoration:none;
  transition:color 180ms ease;
}
.site-nav__list a::after{
  content:"";
  position:absolute;
  left:6px; right:6px; bottom:9px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 180ms ease, background 180ms ease;
}
.site-nav__list a:hover,
.site-nav__list a:focus-visible{ color:var(--ice); }
.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after{ transform:scaleX(1); }
.site-nav__list a[aria-current="page"]{ color:var(--ice); font-weight:700; }
.site-nav__list a[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--orange);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--steel);
  color:var(--ice);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color 180ms ease, color 180ms ease;
}
.nav-toggle:hover{ border-color:var(--cyan); color:var(--cyan); }
.nav-toggle__bars{ display:flex; flex-direction:column; justify-content:center; gap:3px; width:16px; }
.nav-toggle__bars i{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform 180ms ease, opacity 180ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }

/* ---------- 7. 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:12px 20px 12px 24px;
  background:var(--night-blue);
  border:1px solid var(--steel);
  color:var(--ice);
  font-size:13px;
  letter-spacing:.14em;
  text-decoration:none;
  cursor:pointer;
  overflow:hidden;
  transition:transform 180ms ease, border-color 180ms ease, color 180ms ease, background 180ms ease;
}
.btn::before{
  content:"";
  position:absolute;
  left:0; top:0; bottom:0;
  width:4px;
  background:linear-gradient(180deg, var(--cyan), rgba(44,229,210,0));
  transform:skewX(-14deg);
  transition:opacity 180ms ease;
  opacity:.55;
}
.btn:hover,
.btn:focus-visible{ transform:translateY(-2px); border-color:var(--cyan); color:var(--cyan); }
.btn:hover::before,
.btn:focus-visible::before{ opacity:1; }
.btn--primary{
  background:var(--orange);
  border-color:transparent;
  color:#08131f;
  font-weight:800;
}
.btn--primary::before{ background:linear-gradient(180deg, rgba(6,20,38,.65), rgba(6,20,38,0)); opacity:.8; }
.btn--primary:hover,
.btn--primary:focus-visible{ color:#08131f; background:var(--amber); border-color:transparent; }
.btn--ghost{ background:transparent; }
.btn--sm{ padding:9px 14px 9px 18px; font-size:11px; letter-spacing:.18em; }

/* ---------- 8. 布局骨架 ---------- */
.container{
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
}
.section{ padding-block:clamp(40px,6vw,84px); }
.section__head{ display:flex; flex-direction:column; gap:12px; margin-bottom:clamp(24px,3vw,44px); }

.split{
  display:grid;
  gap:clamp(22px,3vw,48px);
  align-items:start;
}
.split--4-7{ grid-template-columns:4fr 7fr; }
.split--3-8{ grid-template-columns:3fr 8fr; }

.grid{ display:grid; gap:clamp(14px,1.8vw,24px); }
.grid--2{ grid-template-columns:repeat(2, minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3, minmax(0,1fr)); }

/* ---------- 9. 排版组件 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(32px,6vw,88px);
  line-height:1.04;
  letter-spacing:-.02em;
  color:var(--ice);
}
.numeral{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  line-height:.95;
  letter-spacing:-.02em;
  color:var(--ice);
}
.numeral--xl{ font-size:clamp(48px,12vw,160px); }
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:2px;
  background:var(--orange);
  flex:none;
}
.lede{
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.75;
  color:var(--mist);
  max-width:40em;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  background:rgba(12,35,64,.75);
  border:1px solid var(--steel);
  color:var(--mist);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  white-space:nowrap;
}
.chip--cyan{ color:var(--cyan); border-color:rgba(44,229,210,.5); }
.chip--amber{ color:var(--amber); border-color:rgba(255,196,77,.5); }
.divider{
  height:1px;
  border:0;
  background:repeating-linear-gradient(90deg, var(--steel) 0 10px, transparent 10px 18px);
}

/* ---------- 10. 面板与卡片 ---------- */
.panel{
  position:relative;
  background:var(--night-blue);
  border:1px solid var(--steel);
  padding:clamp(18px,2.4vw,30px);
  clip-path:var(--cut-path);
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:20px 20px 20px 26px;
  background:var(--night-blue);
  border:1px solid var(--steel);
  color:inherit;
  text-decoration:none;
  transition:transform 180ms ease, border-color 180ms ease, background 180ms ease;
}
.card::before{
  content:"";
  position:absolute;
  left:0; top:0; bottom:0;
  width:4px;
  background:var(--steel);
  transition:background 180ms ease;
}
.card::after{
  content:"";
  position:absolute;
  right:0; top:0; bottom:0;
  width:3px;
  background:linear-gradient(180deg, var(--cyan), rgba(44,229,210,0));
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform 200ms ease;
}
.card:hover,
.card:focus-visible{
  transform:translateY(-4px);
  border-color:var(--cyan);
  background:#0e2a4b;
}
.card:hover::before,
.card:focus-visible::before{ background:var(--cyan); }
.card:hover::after,
.card:focus-visible::after{ transform:scaleY(1); }
.card--wide{ grid-column:span 2; }
.card__title{ font-size:clamp(17px,1.8vw,21px); font-weight:800; color:var(--ice); }
.card__text{ font-size:14px; color:var(--mist); max-width:38em; }
.card__meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px 14px;
  margin-top:auto;
  padding-top:10px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
  border-top:1px solid rgba(27,58,92,.7);
}

/* ---------- 11. 图像容器（页面阶段放占位图） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:linear-gradient(140deg, #0C2340 0%, #071a30 55%, #061426 100%);
  border:1px solid var(--steel);
  clip-path:var(--cut-path);
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(115deg, rgba(44,229,210,.16) 0 2px, transparent 2px 100%),
    repeating-linear-gradient(115deg, rgba(27,58,92,.35) 0 1px, transparent 1px 22px);
  opacity:.7;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:4 / 5; }
.media-frame--square{ aspect-ratio:1 / 1; }
.media-frame__caption{
  display:block;
  margin-top:10px;
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 12. 信息系统 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb li{ display:inline-flex; align-items:center; }
.breadcrumb li + li::before{
  content:"/";
  margin-inline:10px;
  color:var(--steel);
}
.breadcrumb a{ color:var(--mist); text-decoration:none; }
.breadcrumb a:hover,
.breadcrumb a:focus-visible{ color:var(--cyan); }
.breadcrumb [aria-current="page"]{ color:var(--ice); }

.data-list{
  display:grid;
  border-top:1px solid var(--steel);
}
.data-list > div{
  display:grid;
  grid-template-columns:minmax(96px,1fr) 2.4fr;
  gap:16px;
  padding:12px 0;
  border-bottom:1px solid rgba(27,58,92,.7);
}
.data-list dt{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}
.data-list dd{
  margin:0;
  color:var(--ice);
  font-size:15px;
}
.data-list dd .numeral{ font-size:18px; color:var(--amber); }

/* ---------- 13. 进视口渐显协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 420ms ease, transform 420ms ease;
}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 14. 辅助类 ---------- */
.visually-hidden{
  position:absolute !important;
  width:1px; height:1px;
  margin:-1px; padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 15. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg, #061426 0%, #030c18 100%);
  border-top:1px solid var(--steel);
  color:var(--mist);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0; right:0; top:-1px;
  height:2px;
  background:linear-gradient(90deg, rgba(44,229,210,.5), rgba(255,107,34,.4), transparent);
}
.site-footer__inner{
  display:grid;
  grid-template-columns:repeat(4, minmax(0,1fr));
  gap:clamp(24px,3vw,40px);
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
  padding-block:clamp(36px,5vw,64px) clamp(24px,3vw,40px);
}
.site-footer__col{ display:flex; flex-direction:column; gap:12px; min-width:0; }
.site-footer__brand{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--ice);
  padding-bottom:10px;
  border-bottom:2px solid var(--cyan);
  align-self:flex-start;
}
.site-footer__head{
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--amber);
}
.site-footer__links{ display:flex; flex-direction:column; gap:8px; font-size:14px; }
.site-footer__links a{
  color:var(--mist);
  text-decoration:none;
  transition:color 160ms ease, padding-left 160ms ease;
}
.site-footer__links a:hover,
.site-footer__links a:focus-visible{ color:var(--cyan); padding-left:4px; }
.site-footer__links--plain li{
  display:flex;
  flex-direction:column;
  gap:2px;
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.site-footer__val{
  font-size:14px;
  letter-spacing:0;
  text-transform:none;
  color:var(--ice);
  word-break:break-word;
}
.site-footer__note{
  font-size:12px;
  line-height:1.7;
  color:var(--mist);
  max-width:30em;
}
.site-footer__track{
  display:flex;
  align-items:center;
  gap:14px;
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
  padding-bottom:8px;
}
.site-footer__track-line{
  position:relative;
  flex:1;
  height:3px;
  background:repeating-linear-gradient(90deg, var(--steel) 0 14px, transparent 14px 24px);
}
.site-footer__track-line::after{
  content:"";
  position:absolute;
  left:0; top:0; bottom:0;
  width:38%;
  background:linear-gradient(90deg, var(--cyan), rgba(44,229,210,0));
}
.site-footer__track-end{
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
  white-space:nowrap;
}
.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  width:min(100% - 2rem, var(--shell-w));
  margin-inline:auto;
  padding-block:18px 30px;
  border-top:1px solid rgba(27,58,92,.6);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.site-footer__bottom p{ max-width:none; }

/* ---------- 16. 响应式 ---------- */
@media (max-width:1100px){
  .grid--3{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .split--4-7,
  .split--3-8{ grid-template-columns:1fr; }
}

@media (max-width:900px){
  body{ background-attachment:scroll; }

  .site-header__inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding-block:12px 10px;
  }
  .masthead{ text-align:left; }
  .masthead__brand{ gap:8px; }
  .masthead__glyph{ width:30px; height:30px; font-size:16px; }
  .masthead__name{ font-size:20px; }
  .masthead__tagline{ display:none; }
  .masthead__meta{ display:none; }

  .nav-toggle{ display:inline-flex; }

  .site-nav{
    display:none;
    border-top:1px solid var(--steel);
    background:var(--night-blue);
  }
  .site-nav[data-open]{ display:block; }
  .site-nav__list{
    flex-direction:column;
    gap:0;
    padding:6px 0 14px;
  }
  .site-nav__list li{ width:100%; }
  .site-nav__list a{
    padding:14px 4px;
    border-bottom:1px solid rgba(27,58,92,.7);
  }
  .site-nav__list a::after{ bottom:6px; }

  .site-footer__inner{ grid-template-columns:repeat(2, minmax(0,1fr)); }
}

@media (max-width:620px){
  .grid--2,
  .grid--3{ grid-template-columns:1fr; }
  .card--wide{ grid-column:span 1; }
  .site-footer__inner{ grid-template-columns:1fr; }
  .site-footer__bottom{ flex-direction:column; align-items:flex-start; }
  .data-list > div{ grid-template-columns:1fr; gap:4px; }
  .btn{ padding:11px 16px 11px 20px; }
}

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{ opacity:1; transform:none; }
}