/* ==========================================================================
   万博体育 — 共享站点样式 /assets/site.css
   夜场指挥室：深墨绿底 / 荧光青交互 / 信号橙行动 / 沙金归档
   ========================================================================== */

:root{
  --bg:#071C16;
  --bg-2:#0D2A21;
  --surface:#123B30;
  --text:#EAF5EE;
  --muted:#99AAA1;
  --cyan:#22F2D2;
  --orange:#FF6A2A;
  --sand:#C9A45C;
  --ice:#6BD6FF;
  --cream:#F3E7D0;
  --line:rgba(34,242,210,.18);
  --line-soft:rgba(234,245,238,.10);
  --glass:rgba(18,59,48,.55);
  --shell:1240px;
  --gutter:clamp(1.1rem,4vw,3rem);
  --radius-s:4px;
  --radius:10px;
  --radius-l:18px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:1rem;
  font-weight:400;
  line-height:1.75;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(120% 80% at 78% -12%,rgba(34,242,210,.10),transparent 62%),
    radial-gradient(90% 60% at 4% 0%,rgba(201,164,92,.07),transparent 56%),
    repeating-linear-gradient(115deg,rgba(234,245,238,.022) 0 1px,transparent 1px 96px);
  -webkit-font-smoothing:antialiased;
}
img,svg,picture,video{display:block;max-width:100%;}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:900;line-height:1.15;letter-spacing:-.02em;color:var(--text);}
h1{font-size:clamp(2.6rem,6vw,4.6rem);}
h2{font-size:clamp(1.75rem,3.4vw,2.9rem);}
h3{font-size:clamp(1.2rem,2vw,1.55rem);}
p{margin:0;}
ul,ol{margin:0;}
a{color:var(--ice);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--cyan);}
button{font:inherit;color:inherit;}
::selection{background:var(--cyan);color:#04211b;}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 布局基础 ---------- */
.shell{
  width:100%;
  max-width:calc(var(--shell) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(2.75rem,6vw,5rem);}
.section--tight{padding-block:clamp(1.5rem,3.5vw,2.75rem);}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 排版工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:.875em;
  letter-spacing:.02em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.2em;
  color:var(--sand);
}
.eyebrow::before{content:"";width:1.15rem;height:1px;background:var(--sand);}
.lede{
  max-width:56ch;
  font-size:clamp(1.02rem,1.5vw,1.18rem);
  line-height:1.8;
  color:var(--muted);
}
.prose{max-width:72ch;font-size:1.0625rem;line-height:1.8;color:var(--text);}
.prose p + p{margin-top:1.05em;}
.prose h2,.prose h3{margin-top:1.9em;margin-bottom:.6em;}
.prose a{color:var(--ice);border-bottom:1px solid rgba(107,214,255,.35);}
.prose a:hover{color:var(--cyan);border-color:var(--cyan);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.72rem 1.35rem;
  border:1px solid transparent;border-radius:999px;
  font-size:.95rem;font-weight:700;letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--orange);color:#180A03;}
.btn--primary:hover{background:#FF8752;color:#180A03;transform:translateY(-1px);}
.btn--ghost{border-color:rgba(34,242,210,.5);color:var(--cyan);background:transparent;}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(34,242,210,.10);color:var(--cyan);transform:translateY(-1px);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:.45rem;margin:0;padding:0;list-style:none;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb li + li::before{content:"/";margin-right:.45rem;color:rgba(153,170,161,.55);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cyan);}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(1rem,2.6vw,1.75rem);grid-template-columns:minmax(0,1fr);}
@media (min-width:700px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:860px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
  .grid--split{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);align-items:start;}
}

/* ---------- 卡片与标签 ---------- */
.card{
  position:relative;
  padding:clamp(1.1rem,2.4vw,1.6rem);
  background:var(--surface);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background-color .2s var(--ease);
}
.card:hover{border-color:rgba(34,242,210,.55);transform:translateY(-2px);}
.card--glass{
  background:var(--glass);
  border-color:rgba(34,242,210,.22);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.card--archive{border-left:3px solid var(--sand);}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.18rem .6rem;border-radius:999px;
  border:1px solid rgba(34,242,210,.35);
  color:var(--cyan);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;
}
.tag--sand{border-color:rgba(201,164,92,.45);color:var(--sand);}
.tag--orange{border-color:rgba(255,106,42,.45);color:var(--orange);}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 100% at 18% 0%,rgba(34,242,210,.16),transparent 62%),
    linear-gradient(160deg,var(--surface),var(--bg-2));
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.85) contrast(1.05);
}
.media-frame::after{
  content:"";position:absolute;right:.6rem;bottom:.6rem;
  width:1.4rem;height:1.4rem;
  border-right:1px solid var(--cyan);
  border-bottom:1px solid var(--cyan);
  opacity:.7;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__caption{
  display:block;margin-top:.6rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 折叠面板 ---------- */
.disclosure{
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:rgba(18,59,48,.5);
  overflow:hidden;
}
.disclosure + .disclosure{margin-top:.6rem;}
.disclosure > summary{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.95rem 1.15rem;
  font-weight:700;cursor:pointer;list-style:none;
}
.disclosure > summary::-webkit-details-marker{display:none;}
.disclosure > summary::after{
  content:"+";font-family:var(--font-mono);font-size:1.1rem;line-height:1;
  color:var(--cyan);
}
.disclosure[open] > summary::after{content:"–";}
.disclosure__body{padding:0 1.15rem 1.15rem;color:var(--muted);}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;left:1rem;top:1rem;z-index:200;
  padding:.65rem 1rem;border-radius:var(--radius-s);
  background:var(--cyan);color:#04211b;
  font-size:.9rem;font-weight:700;
  transform:translateY(-200%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:#04211b;}

/* ---------- 站点头部 ---------- */
.site-header{position:relative;}

.utility-bar{
  background:var(--bg-2);
  border-bottom:1px solid var(--line-soft);
  font-size:.78rem;letter-spacing:.08em;color:var(--muted);
}
.utility-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:1rem;min-height:2.25rem;padding-block:.35rem;
}
.utility-note{margin:0;}
.utility-meta{
  display:inline-flex;align-items:center;gap:.5rem;margin:0;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;
  color:var(--sand);
}
.utility-dot{
  width:.45rem;height:.45rem;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(34,242,210,.16);
  animation:led-pulse 2.8s ease-in-out infinite;
}
@keyframes led-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(34,242,210,.16);}
  50%{opacity:.55;box-shadow:0 0 0 5px rgba(34,242,210,.05);}
}

.masthead{
  position:relative;
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(13,42,33,.92),rgba(7,28,22,.35));
}
.masthead::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,242,210,.55),transparent);
  opacity:.7;pointer-events:none;
}
.masthead-inner{
  position:relative;
  display:flex;align-items:center;justify-content:center;
  padding-block:1.7rem 1.3rem;
}
.brand{
  display:inline-flex;align-items:center;gap:clamp(.7rem,2.6vw,1.4rem);
  color:var(--text);
}
.brand:hover{color:var(--text);}
.brand-rule{
  display:block;height:1px;
  width:clamp(1.1rem,6vw,4.75rem);
  background:linear-gradient(90deg,transparent,rgba(34,242,210,.85));
}
.brand-rule:last-child{background:linear-gradient(90deg,rgba(34,242,210,.85),transparent);}
.brand-text{display:flex;flex-direction:column;align-items:center;gap:.3rem;}
.brand-name{
  font-size:clamp(1.85rem,5vw,2.85rem);
  font-weight:900;line-height:1;
  letter-spacing:.08em;text-indent:.08em;
  color:var(--text);
}
.brand-tagline{
  font-size:.72rem;font-weight:500;
  letter-spacing:.34em;text-indent:.34em;
  color:var(--sand);white-space:nowrap;
}

.nav-toggle{
  display:none;
  position:absolute;right:0;top:50%;transform:translateY(-50%);
  align-items:center;gap:.55rem;
  padding:.5rem .75rem;
  background:rgba(7,28,22,.6);
  border:1px solid var(--line);
  border-radius:var(--radius-s);
  color:var(--text);
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle-box{
  display:inline-flex;flex-direction:column;justify-content:space-between;
  width:1.05rem;height:10px;
}
.nav-toggle-box span{
  display:block;height:2px;width:100%;
  background:currentColor;border-radius:1px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1){transform:translateY(4px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3){transform:translateY(-4px) rotate(-45deg);}
.nav-toggle-text{font-size:.78rem;font-weight:700;letter-spacing:.14em;}

.site-nav{
  background:rgba(7,28,22,.55);
  border-bottom:1px solid var(--line-soft);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.nav-list{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:clamp(.5rem,2.4vw,2.1rem);
  margin:0;padding:0;
  padding-block:.8rem;
  list-style:none;
}
.nav-item{margin:0;}
.nav-link{
  position:relative;display:inline-block;
  padding:.3rem .1rem;
  font-size:.95rem;font-weight:600;letter-spacing:.04em;
  color:var(--text);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-.18rem;
  width:0;height:2px;background:var(--cyan);
  transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan);}
.nav-link:hover::after{width:58%;}
.nav-link[aria-current="page"]{color:var(--cyan);}
.nav-link[aria-current="page"]::after{width:100%;}

.scroll-progress{
  position:fixed;left:0;right:0;top:0;height:2px;
  background:rgba(234,245,238,.07);
  z-index:120;pointer-events:none;
}
.scroll-progress-fill{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}

/* ---------- 站点页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  background:linear-gradient(180deg,var(--bg-2),#04120E 72%);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,242,210,.6),transparent);
}
.footer-inner{padding-block:clamp(2.5rem,6vw,4.5rem) 1.5rem;}
.footer-top{
  display:grid;gap:clamp(1.75rem,4vw,3rem);
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:820px){
  .footer-top{grid-template-columns:minmax(0,1.5fr) minmax(0,.85fr) minmax(0,1.25fr);}
}
.footer-brand{min-width:0;}
.footer-logo{
  display:inline-block;
  font-size:clamp(1.4rem,3vw,1.9rem);
  font-weight:900;line-height:1.1;
  letter-spacing:.1em;
  color:var(--text);
}
.footer-logo:hover{color:var(--cyan);}
.footer-line{
  margin-top:.7rem;max-width:34ch;
  font-size:.9rem;color:var(--muted);
}
.footer-cta{margin-top:1.15rem;}
.footer-col{min-width:0;}
.footer-heading{
  margin-bottom:.95rem;
  font-family:var(--font-mono);
  font-size:.72rem;font-weight:600;
  letter-spacing:.22em;
  color:var(--sand);
}
.footer-links{list-style:none;padding:0;display:grid;gap:.55rem;}
.footer-links a{
  display:inline-block;
  font-size:.92rem;color:var(--text);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a:hover{color:var(--cyan);transform:translateX(3px);}
.footer-contact{list-style:none;padding:0;display:grid;gap:.75rem;}
.footer-contact-item{
  display:grid;gap:.15rem;
  font-size:.9rem;
}
.footer-contact-label{
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.18em;
  color:rgba(153,170,161,.75);
}
.footer-contact-value{color:var(--text);line-height:1.65;}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.85rem 1.75rem;
  margin-top:clamp(1.75rem,4vw,2.75rem);
  padding-top:1.25rem;
  border-top:1px solid var(--line-soft);
  font-size:.8rem;color:var(--muted);
}
.footer-legal{
  display:flex;flex-wrap:wrap;gap:.35rem 1.25rem;
  margin:0;padding:0;list-style:none;
}
.footer-legal a{color:var(--muted);border-bottom:1px solid rgba(153,170,161,.3);}
.footer-legal a:hover{color:var(--cyan);border-color:var(--cyan);}
.footer-icp{
  font-family:var(--font-mono);
  font-size:.74rem;letter-spacing:.04em;
  color:rgba(153,170,161,.9);
}
.footer-copy{margin:0;font-size:.78rem;color:rgba(153,170,161,.9);}

/* ---------- 移动端导航状态 ---------- */
@media (max-width:899px){
  .nav-toggle{display:inline-flex;}
  .masthead-inner{padding-block:1.3rem 1.05rem;}
  .site-nav{
    max-height:0;overflow:hidden;
    border-bottom-color:transparent;
    transition:max-height .26s var(--ease),border-color .26s var(--ease);
  }
  .site-nav[data-open]{
    max-height:32rem;
    border-bottom-color:var(--line-soft);
  }
  .nav-list{
    flex-direction:column;align-items:stretch;
    gap:0;padding-block:0;
  }
  .nav-link{
    display:block;
    padding:.9rem 1.15rem;
    border-bottom:1px solid var(--line-soft);
    font-size:1rem;
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{
    box-shadow:inset 3px 0 0 var(--cyan);
    background:rgba(34,242,210,.07);
  }
}

@media (max-width:520px){
  .brand{gap:.6rem;}
  .brand-rule{width:.9rem;}
  .brand-tagline{letter-spacing:.22em;text-indent:.22em;font-size:.66rem;}
  .utility-note{font-size:.7rem;letter-spacing:.04em;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .utility-dot{animation:none;}
}

/* ---------- 滚动显现（由 JS 开启 reveal-ready） ---------- */
.reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.reveal-ready [data-reveal].is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal-ready [data-reveal]{opacity:1;transform:none;}
}