/* =========================================================
   星空赛事 · 共享样式 /assets/site.css
   夜间指挥室 · 星轨网格 · 电光青 / 活力橙 / 星云紫
   ========================================================= */

/* ---------- 01 设计变量 ---------- */
:root{
  color-scheme: dark;

  --ink-900:#05070E;
  --ink-800:#0C1424;
  --line:#1B2740;
  --text:#EDF3FF;
  --text-muted:#93A6C6;
  --cyan:#22E0D2;
  --orange:#FF7A29;
  --violet:#7C5CFF;
  --alert:#FF4D6D;
  --starwhite:#F2F6FF;
  --ink-on-light:#08101F;

  --font-cn:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-display:'Space Grotesk','Barlow','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;

  --shell:1280px;
  --gutter:clamp(18px,4vw,48px);
  --header-h:72px;
  --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}
html,body{margin:0;padding:0}
body{
  min-height:100%;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 84% -6%, rgba(124,92,255,.22), transparent 62%),
    radial-gradient(880px 520px at 4% 8%, rgba(34,224,210,.12), transparent 60%),
    radial-gradient(900px 720px at 62% 104%, rgba(255,122,41,.07), transparent 66%);
  -webkit-font-smoothing:antialiased;
}
/* 星轨网格：整页共用的一层隐形骨架 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(27,39,64,.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27,39,64,.32) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(130% 110% at 50% 0%, #000 18%, transparent 80%);
  mask-image:radial-gradient(130% 110% at 50% 0%, #000 18%, transparent 80%);
}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:1px}

/* ---------- 03 中文排版基准 ---------- */
h1,h2,h3,h4{font-family:var(--font-display);font-weight:300;line-height:1.22}
p{max-width:68ch}
strong{font-weight:500;color:var(--text)}

.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:'tnum' 1;
  letter-spacing:.02em;
}

/* ---------- 04 容器与章节 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.section{padding:clamp(72px,9vw,148px) 0}
.section--tight{padding:clamp(44px,5vw,88px) 0}
.section--tint{
  background:linear-gradient(180deg, rgba(12,20,36,.82), rgba(12,20,36,.34));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section--invert{
  background:var(--starwhite);
  color:var(--ink-on-light);
  border-top:1px solid rgba(8,16,31,.12);
  border-bottom:1px solid rgba(8,16,31,.12);
}
.section--invert .section-title{color:#05070E}
.section--invert .section-lead{color:#46587A}
.section--invert .eyebrow{color:#0A6F6B}
.section--invert .eyebrow::before{background:#0A6F6B}
.section--invert .rule{background:rgba(8,16,31,.16)}

.section-head{display:grid;gap:16px;max-width:64ch}
.eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--cyan);flex:0 0 auto}
.section-title{
  font-size:clamp(28px,3.6vw,40px);
  font-weight:300;
  letter-spacing:.08em;
}
.section-lead{color:var(--text-muted);font-size:16px;max-width:56ch}
.rule{height:1px;border:0;background:var(--line);margin:0}

/* ---------- 05 面板 / 标签 / 状态 ---------- */
.panel{
  background:rgba(12,20,36,.62);
  border:1px solid var(--line);
  padding:clamp(20px,2.4vw,32px);
  box-shadow:0 2px 4px rgba(0,0,0,.38);
}
.panel--tint{background:rgba(27,39,64,.42)}
.panel--cyan{border-color:rgba(34,224,210,.42)}
.panel--orange{border-color:rgba(255,122,41,.42)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  font-size:11px;letter-spacing:.2em;
  color:var(--text-muted);
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(34,224,210,.45)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,41,.45)}

.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;
  background:rgba(34,224,210,.1);
  border:1px solid rgba(34,224,210,.35);
  font-size:12px;letter-spacing:.14em;
  color:var(--cyan);
}
.pill--alert{background:rgba(255,77,109,.12);border-color:rgba(255,77,109,.4);color:var(--alert)}

.status-dot{
  width:8px;height:8px;flex:0 0 auto;
  border-radius:50%;
  background:currentColor;
  color:var(--cyan);
  animation:status-pulse 2.4s ease-in-out infinite;
}
.status-dot--alert{color:var(--alert)}
.status-dot--idle{color:var(--text-muted);animation:none}
@keyframes status-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 0 currentColor}
  50%{opacity:.5;box-shadow:0 0 0 6px rgba(34,224,210,0)}
}

/* ---------- 06 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.c-3{grid-column:span 3}
.c-4{grid-column:span 4}
.c-6{grid-column:span 6}
.c-8{grid-column:span 8}
.c-9{grid-column:span 9}
.c-12{grid-column:span 12}

/* ---------- 07 图像容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  border:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 14% 0%, rgba(124,92,255,.3), transparent 58%),
    radial-gradient(90% 80% at 88% 100%, rgba(34,224,210,.16), transparent 62%),
    linear-gradient(160deg,#0C1424,#05070E);
}
.media-frame > img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.95) contrast(1.06);
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(27,39,64,.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27,39,64,.4) 1px, transparent 1px);
  background-size:48px 48px;
  opacity:.55;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:1;
  padding:12px 14px;
  font-size:11px;letter-spacing:.18em;
  color:var(--text-muted);
  background:linear-gradient(0deg, rgba(5,7,14,.88), transparent);
}

/* ---------- 08 面包屑与文字链接 ---------- */
.breadcrumbs{
  padding:24px 0 0;
  font-size:12px;letter-spacing:.16em;
  color:var(--text-muted);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:inline-flex;align-items:center}
.breadcrumbs li + li::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumbs a{text-decoration:none;color:var(--text-muted);transition:color .24s var(--ease)}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--text)}

.link-arrow{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;
  color:var(--cyan);
  text-decoration:none;
}
.link-arrow::before{content:"→";font-family:var(--font-mono);font-size:14px}
.link-arrow::after{
  content:"";
  position:absolute;left:0;bottom:-4px;
  width:100%;height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .32s var(--ease);
}
.link-arrow:hover::after,.link-arrow:focus-visible::after{transform:scaleX(1)}

/* ---------- 09 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  font-size:13px;letter-spacing:.12em;line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn--primary{
  background:var(--orange);
  color:#0A0F1A;
  font-weight:500;
  clip-path:polygon(11px 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%,0 11px);
}
.btn--primary:hover,.btn--primary:focus-visible{background:#FF9550;transform:translateY(-1px)}
.btn--ghost{
  color:var(--text);
  border-color:var(--line);
  background:rgba(12,20,36,.6);
}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:rgba(34,224,210,.55);color:var(--cyan)}
.btn--outline{color:var(--cyan);border-color:rgba(34,224,210,.55)}
.btn--outline:hover,.btn--outline:focus-visible{background:rgba(34,224,210,.12);border-color:var(--cyan)}
.btn--sm{padding:7px 13px;font-size:12px;letter-spacing:.14em}

/* ---------- 10 跳转链接 ---------- */
.skip-link{
  position:absolute;left:14px;top:-60px;z-index:140;
  padding:10px 16px;
  background:var(--cyan);
  color:#04121A;
  font-size:13px;letter-spacing:.12em;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}

/* ---------- 11 头部命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  --header-h:72px;
  background:rgba(5,7,14,.88);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background-color .3s var(--ease);
}
.site-header[data-scrolled="true"]{
  --header-h:56px;
  background:rgba(5,7,14,.97);
  box-shadow:0 1px 0 rgba(34,224,210,.2);
}
.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,36px);
  height:var(--header-h);
  transition:height .3s var(--ease);
}

.brand{
  display:inline-flex;align-items:center;gap:12px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--text);
}
.brand-mark{
  width:20px;height:20px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--cyan) 0%,var(--violet) 62%,var(--orange) 100%);
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-name{
  font-family:var(--font-display);
  font-size:15px;font-weight:500;letter-spacing:.2em;
}
.brand-sub{font-size:10.5px;letter-spacing:.18em;color:var(--text-muted)}
.brand--footer .brand-name{font-size:16px}

.nav{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,32px);
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:clamp(8px,1.6vw,22px)}
.nav-item{display:flex}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 2px;
  font-size:13px;letter-spacing:.12em;
  color:var(--text-muted);
  text-decoration:none;
  white-space:nowrap;
  transition:color .24s var(--ease);
}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.08em;
  color:rgba(147,166,198,.62);
  transition:color .24s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .32s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--text)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--text)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"] .nav-idx{color:var(--cyan)}
.nav-actions{display:flex;align-items:center;gap:10px}

.nav-toggle{
  display:none;
  align-items:center;gap:10px;
  padding:9px 14px;
  border:1px solid var(--line);
  background:rgba(12,20,36,.7);
  color:var(--text);
  font-size:12px;letter-spacing:.18em;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.nav-toggle-bars{
  display:inline-flex;flex-direction:column;justify-content:space-between;
  width:18px;height:9px;
}
.nav-toggle-bars span{
  display:block;height:1.5px;width:100%;
  background:currentColor;
  transition:transform .24s var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:rgba(34,224,210,.55);color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(3.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-3.75px) rotate(-45deg)}

.scroll-meter{
  position:absolute;left:0;bottom:-1px;
  width:100%;height:2px;
  transform:scaleX(0);
  transform-origin:left;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--orange));
  transition:transform .12s linear;
  pointer-events:none;
}

/* ---------- 12 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,8vw,120px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(1000px 420px at 8% 0%, rgba(124,92,255,.2), transparent 62%),
    radial-gradient(720px 380px at 88% 8%, rgba(34,224,210,.1), transparent 64%),
    linear-gradient(180deg, rgba(12,20,36,.88), rgba(5,7,14,1));
}
.footer-shell{
  display:grid;
  grid-template-columns:minmax(240px,1.15fr) minmax(300px,1.5fr) minmax(250px,1.05fr);
  gap:clamp(24px,3vw,48px);
  align-items:start;
  padding-top:clamp(48px,6vw,80px);
  padding-bottom:clamp(24px,3vw,36px);
}

.footer-brand{display:grid;gap:16px;align-content:start;justify-items:start}
.footer-tagline{font-size:14px;color:var(--text-muted);max-width:26ch}
.footer-cta{margin-top:2px}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,2.4vw,32px);
}
.footer-col{display:grid;gap:0;align-content:start}
.footer-col-title{
  display:flex;align-items:center;gap:10px;
  margin-bottom:18px;
  font-family:var(--font-cn);
  font-size:11px;font-weight:400;letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.footer-col-title::before{
  content:"";
  width:6px;height:6px;flex:0 0 auto;
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.footer-list{display:grid;gap:11px}
.footer-list a{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--text-muted);
  text-decoration:none;
  transition:color .24s var(--ease);
}
.footer-list a::after{
  content:"";
  position:absolute;left:0;bottom:-3px;
  width:100%;height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--text)}
.footer-list a:hover::after,.footer-list a:focus-visible::after{transform:scaleX(1)}

.footer-contact{display:grid;gap:16px;align-content:start}
.footer-contact .footer-col-title::before{background:var(--orange)}
.footer-contact-list{display:grid;gap:14px}
.footer-contact-list li{display:grid;gap:4px}
.footer-label{
  font-size:10.5px;letter-spacing:.24em;
  color:rgba(147,166,198,.78);
}
.footer-value{font-size:14px;color:var(--text);word-break:break-word}
.footer-value--mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.footer-note{
  padding-left:12px;
  border-left:2px solid rgba(255,122,41,.62);
  font-size:12px;
  color:var(--text-muted);
  max-width:34ch;
}

.footer-legal{
  grid-column:1 / -1;
  margin-top:clamp(32px,4vw,56px);
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  font-size:12px;
  color:var(--text-muted);
}
.footer-legal-line{font-family:var(--font-mono);letter-spacing:.06em}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal-links a{color:var(--text-muted);text-decoration:none;transition:color .24s var(--ease)}
.footer-legal-links a:hover,.footer-legal-links a:focus-visible{color:var(--cyan)}

/* ---------- 13 滚动显现协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 14 响应式 ---------- */
@media (max-width:1180px){
  .nav-list{gap:12px}
  .nav-link{font-size:12.5px;letter-spacing:.08em}
  .nav-actions .btn--ghost{display:none}
}
@media (max-width:1080px){
  .footer-shell{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-cols{grid-column:1 / -1;grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .c-3,.c-4{grid-column:span 6}
  .c-8,.c-9{grid-column:span 12}
}
@media (max-width:960px){
  .site-header{--header-h:60px}
  .brand-sub{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav{
    position:fixed;
    top:var(--header-h);left:0;right:0;
    z-index:70;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:8px var(--gutter) 28px;
    max-height:calc(100vh - var(--header-h));
    overflow:auto;
    background:rgba(7,11,20,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(0,0,0,.55);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
  }
  .nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{width:100%}
  .nav-link{
    display:flex;
    padding:15px 0;
    font-size:14px;
    letter-spacing:.12em;
    border-bottom:1px solid rgba(27,39,64,.72);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan)}
  .nav-link[aria-current="page"] .nav-idx{color:var(--orange)}
  .nav-actions{flex-direction:column;align-items:stretch;gap:12px;margin-top:20px}
  .nav-actions .btn{padding:13px 18px}
  .nav-actions .btn--ghost{display:inline-flex}
}
@media (max-width:680px){
  body{font-size:15.5px}
  .section-title{letter-spacing:.04em}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .c-3,.c-4,.c-6{grid-column:span 12}
  .footer-cols{grid-template-columns:1fr;gap:28px}
  .footer-legal{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .brand-name{font-size:13.5px;letter-spacing:.14em}
  .nav-toggle-label{display:none}
  .btn{font-size:12.5px;padding:10px 16px}
}

/* ---------- 15 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none;transition:none}
  .status-dot{animation:none;box-shadow:none}
  .scroll-meter{transition:none}
}