/* ==========================================================================
   欧宝体育主站 · 共享外壳样式 /assets/site.css
   01 变量 · 02 重置 · 03 排版 · 04 容器与面板 · 05 头部 · 06 页脚
   07 通用组件 · 08 动效 · 09 响应式
   ========================================================================== */

/* ---------- 01 变量 ---------- */
:root{
  --void:#03050C;
  --deep:#070B1A;
  --panel:#101A33;
  --panel-2:#0C1528;
  --paper:#F5F7FA;
  --steel:#8A94A8;
  --orange:#FF5A1F;
  --orange-soft:#FF7A45;
  --cyan:#22D3EE;
  --green:#39FF88;
  --amber:#FFB020;
  --line:#D8DEE9;
  --line-soft:rgba(216,222,233,.16);
  --line-faint:rgba(216,222,233,.08);

  --shell:1320px;
  --gutter:clamp(1rem,4vw,3rem);
  --radius:3px;

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

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 02 重置 ---------- */
*,
*::before,
*::after{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  background-color:var(--deep);
  background-image:
    radial-gradient(120% 90% at 12% -12%,rgba(34,211,238,.10),transparent 46%),
    radial-gradient(90% 70% at 96% 4%,rgba(255,90,31,.08),transparent 52%),
    linear-gradient(180deg,#070B1A 0%,#04060F 100%);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:clamp(16px,.32vw + 15px,17.5px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.012em;
}

p{margin:0}

ul,ol{margin:0;padding:0;list-style:none}

a{color:inherit;text-decoration:none}

button{
  margin:0;
  padding:0;
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  cursor:pointer;
}

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

::selection{background:var(--orange);color:var(--void)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

[hidden]{display:none !important}

/* ---------- 03 排版辅助 ---------- */
.u-mono,
.data-value,
[data-mono]{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.data-value{
  color:var(--cyan);
  font-weight:600;
  font-size:clamp(.9rem,1.1vw,1.1rem);
}

.u-note{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}

/* ---------- 04 容器与面板 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

#main-content{scroll-margin-top:6rem}

.panel{
  position:relative;
  padding:clamp(1.25rem,3vw,2rem);
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
}

.panel--flat{background:var(--panel-2)}

.panel--ruled{
  background-image:repeating-linear-gradient(
    90deg,
    rgba(216,222,233,.06) 0 1px,
    transparent 1px 36px
  );
}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:.35rem clamp(.9rem,2vw,1.6rem);
  align-items:start;
}

.section-head__num{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(2.4rem,7vw,4.5rem);
  line-height:.86;
  color:rgba(216,222,233,.20);
  letter-spacing:-.02em;
}

.section-head__title{
  font-size:clamp(1.6rem,2.8vw,2.5rem);
  color:var(--paper);
}

.section-head__note{
  grid-column:2;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.16em;
  color:var(--steel);
  text-transform:uppercase;
}

/* ---------- 05 头部 ---------- */
.skip-link{
  position:fixed;
  top:.75rem;
  left:.75rem;
  z-index:200;
  padding:.7rem 1.1rem;
  background:var(--orange);
  color:var(--void);
  font-weight:800;
  font-size:.9rem;
  border-radius:var(--radius);
  transform:translateY(-220%);
  transition:transform .25s var(--ease);
}

.skip-link:focus-visible{transform:translateY(0)}

.masthead{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg,rgba(7,11,26,.86) 0%,rgba(7,11,26,.28) 62%,rgba(7,11,26,0) 100%);
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease),border-color .35s var(--ease),backdrop-filter .35s var(--ease);
}

.masthead[data-scrolled="true"]{
  background:rgba(3,5,12,.96);
  border-bottom-color:var(--line-soft);
  backdrop-filter:blur(10px) saturate(120%);
}

.masthead__rail{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:.4rem var(--gutter);
  border-bottom:1px solid var(--line-faint);
  color:var(--steel);
}

.masthead__rail-id{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.22em;
  text-transform:uppercase;
}

.masthead__inner{
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.6vw,1.5rem);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:.55rem var(--gutter) .7rem;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.65rem;
  min-width:0;
  flex:0 0 auto;
}

.brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:0 0 auto;
  background:var(--orange);
  color:var(--void);
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:2px;
  transform:skewX(-8deg);
  transition:background .25s var(--ease),transform .25s var(--ease);
}

.brand:hover .brand__mark{
  background:var(--cyan);
  transform:skewX(-8deg) translateY(-1px);
}

.brand__text{
  display:flex;
  flex-direction:column;
  gap:.05rem;
  min-width:0;
}

.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.1rem;
  line-height:1.1;
  letter-spacing:.08em;
  color:var(--paper);
}

.brand__note{
  font-family:var(--font-mono);
  font-size:.6rem;
  line-height:1.2;
  letter-spacing:.16em;
  color:var(--steel);
  white-space:nowrap;
}

/* 主导航 */
.primary-nav{
  display:flex;
  align-items:center;
  margin-inline:auto;
  min-width:0;
}

.primary-nav__list{
  display:flex;
  align-items:center;
  gap:.1rem;
}

.primary-nav__link{
  position:relative;
  display:inline-block;
  padding:.5rem .72rem;
  font-size:.92rem;
  font-weight:500;
  color:var(--steel);
  white-space:nowrap;
  transition:color .22s var(--ease);
}

.primary-nav__link::after{
  content:"";
  position:absolute;
  left:.72rem;
  right:.72rem;
  bottom:.18rem;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .32s var(--ease),background .22s var(--ease);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible{color:var(--paper)}

.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after{transform:scaleX(1)}

.primary-nav__link[aria-current="page"]{
  color:var(--paper);
  font-weight:700;
}

.primary-nav__link[aria-current="page"]::after{
  background:var(--orange);
  transform:scaleX(1);
}

.primary-nav__foot{display:none}

/* 行动区 */
.masthead__actions{
  display:flex;
  align-items:center;
  gap:.5rem;
  flex:0 0 auto;
}

/* 菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  margin-left:auto;
  padding:.6rem .8rem;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  color:var(--paper);
  transition:border-color .22s var(--ease),color .22s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible{
  border-color:var(--orange);
  color:var(--orange);
}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background .2s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .28s var(--ease);
}

.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.nav-toggle__text{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}

.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--orange) 0%,var(--amber) 48%,var(--cyan) 100%);
  transition:transform .12s linear;
}

/* ---------- 06 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--void);
  border-top:1px solid var(--line-soft);
  color:var(--steel);
}

.site-footer__tick{
  height:12px;
  border-bottom:1px solid var(--line-faint);
  background-image:repeating-linear-gradient(
    90deg,
    rgba(216,222,233,.34) 0 1px,
    transparent 1px 46px
  );
  opacity:.55;
}

.site-footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(1.75rem,4vw,3rem);
  padding-block:clamp(2.25rem,5vw,3.75rem);
}

.site-footer__brand{
  display:flex;
  flex-direction:column;
  gap:1rem;
  align-items:flex-start;
}

.brand--footer .brand__name{font-size:1.25rem}

.site-footer__lede{
  max-width:34ch;
  color:var(--steel);
  font-size:.95rem;
  line-height:1.7;
}

.site-footer__meta{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
}

.site-footer__col{min-width:0}

.site-footer__title{
  display:flex;
  align-items:center;
  gap:.55rem;
  margin-bottom:.9rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--paper);
}

.site-footer__title::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--orange);
}

.footer-links{
  display:flex;
  flex-direction:column;
  gap:.1rem;
}

.footer-links__a{
  display:inline-block;
  padding:.34rem 0;
  font-size:.95rem;
  color:var(--steel);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),transform .2s var(--ease);
}

.footer-links__a:hover,
.footer-links__a:focus-visible{
  color:var(--cyan);
  transform:translateX(3px);
}

.contact-list{
  display:flex;
  flex-direction:column;
  gap:.6rem;
}

.contact-list li{
  display:flex;
  flex-direction:column;
  gap:.12rem;
  padding-bottom:.55rem;
  border-bottom:1px dashed var(--line-faint);
}

.contact-list__label{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--steel);
}

.contact-list__value{
  font-size:.92rem;
  line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}

.site-footer__hint{
  margin-top:.9rem;
  font-size:.8rem;
  line-height:1.7;
  color:var(--steel);
}

.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding-block:1.35rem 1.6rem;
  border-top:1px solid var(--line-faint);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--steel);
}

.site-footer__copy{margin:0}

.site-footer__icp{
  margin:0;
  padding:.2rem .55rem;
  border:1px solid var(--line-faint);
  border-radius:2px;
  color:var(--steel);
}

/* ---------- 07 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  min-height:44px;
  padding:.62rem 1.05rem;
  font-size:.88rem;
  font-weight:700;
  letter-spacing:.05em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}

.btn--accent{
  background:var(--orange);
  border-color:var(--orange);
  color:var(--void);
}

.btn--accent:hover,
.btn--accent:focus-visible{
  background:var(--orange-soft);
  border-color:var(--orange-soft);
  transform:translateY(-1px);
}

.btn--ghost{
  background:transparent;
  border-color:var(--line-soft);
  color:var(--paper);
}

.btn--ghost:hover,
.btn--ghost:focus-visible{
  border-color:var(--cyan);
  color:var(--cyan);
}

.status-tag{
  display:inline-flex;
  align-items:center;
  gap:.42rem;
  padding:.28rem .58rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.14em;
  line-height:1.2;
  white-space:nowrap;
  border:1px solid currentColor;
  border-radius:2px;
}

.status-tag__dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  background:currentColor;
  border-radius:50%;
}

.status-tag--ok{color:var(--green)}
.status-tag--info{color:var(--cyan)}
.status-tag--warn{color:var(--amber)}
.status-tag--action{color:var(--orange)}

.status-tag--ok .status-tag__dot{
  animation:ob-pulse 2.4s var(--ease) infinite;
}

@keyframes ob-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.4;transform:scale(.82)}
}

.breadcrumbs{
  padding-block:.9rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--steel);
}

.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55rem;
}

.breadcrumbs__list li{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
}

.breadcrumbs__list li + li::before{
  content:"/";
  color:rgba(216,222,233,.35);
}

.breadcrumbs a{
  color:var(--steel);
  transition:color .2s var(--ease);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible{color:var(--cyan)}

.breadcrumbs [aria-current="page"]{color:var(--paper)}

.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--panel) 0%,var(--void) 100%);
}

.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame__tag{
  position:absolute;
  left:.75rem;
  bottom:.75rem;
  z-index:2;
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(3,5,12,0) 46%,rgba(3,5,12,.58) 100%);
}

.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}

.to-top{
  position:fixed;
  right:clamp(.75rem,3vw,1.75rem);
  bottom:clamp(.75rem,3vw,1.75rem);
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.65rem .9rem;
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}

.to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

.to-top:hover,
.to-top:focus-visible{
  border-color:var(--orange);
  color:var(--orange);
}

/* ---------- 08 动效 ---------- */
html.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(16px);
}

html.js-ready [data-reveal].is-revealed{
  opacity:1;
  transform:none;
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }

  html.js-ready [data-reveal]{
    opacity:1;
    transform:none;
  }

  .primary-nav__link:hover,
  .footer-links__a:hover,
  .btn:hover{transform:none}
}

/* ---------- 09 响应式 ---------- */
@media (max-width:1100px){
  .primary-nav__link{
    padding:.5rem .55rem;
    font-size:.88rem;
  }
  .primary-nav__link::after{left:.55rem;right:.55rem}
}

@media (max-width:960px){
  .masthead__rail-id,
  .masthead__actions{display:none}

  .nav-toggle{display:inline-flex}

  .masthead__inner{
    gap:.75rem;
    padding-block:.6rem;
  }

  .primary-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-inline:0;
    flex-direction:column;
    align-items:stretch;
    padding:.4rem var(--gutter) 1.35rem;
    background:rgba(3,5,12,.985);
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line-soft);
    box-shadow:0 24px 48px rgba(0,0,0,.55);
    max-height:calc(100dvh - 6rem);
    overflow-y:auto;
  }

  .primary-nav[data-open="true"]{display:flex}

  .primary-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }

  .primary-nav__link{
    display:block;
    padding:.85rem .15rem;
    font-size:1.05rem;
    border-bottom:1px solid var(--line-faint);
  }

  .primary-nav__link::after{
    left:.15rem;
    right:auto;
    width:26px;
    bottom:.45rem;
  }

  .primary-nav__foot{
    display:flex;
    flex-wrap:wrap;
    gap:.55rem;
    padding-top:1.1rem;
  }

  .primary-nav__foot .btn{flex:1 1 140px}

  .brand__note{display:none}

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

  .site-footer__brand{grid-column:1 / -1}
}

@media (max-width:640px){
  .masthead__rail{
    padding-block:.35rem;
    font-size:.6rem;
  }

  .brand__mark{width:34px;height:34px;font-size:.76rem}
  .brand__name{font-size:1rem}

  .nav-toggle__text{display:none}

  .site-footer__grid{grid-template-columns:1fr}
  .site-footer__col--contact{grid-column:auto}

  .site-footer__base{
    flex-direction:column;
    align-items:flex-start;
    gap:.5rem;
  }

  .to-top{
    right:.75rem;
    bottom:.75rem;
    padding:.55rem .7rem;
    font-size:.64rem;
  }
}