/* ===== 安博赛场 · 共享外壳 ===== */
:root{
  --ink-900:#070E1A;
  --ink-800:#0E1B2E;
  --ink-700:#16263D;
  --line-500:#2B3B52;
  --cyan:#00E5D0;
  --orange:#FF7A2F;
  --text-100:#DDE5ED;
  --text-300:#93A3B3;
  --paper-200:#E8E2D8;
  --paper-ink:#12202F;

  --font-display:"Barlow Condensed","Oswald","PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SF Mono","Cascadia Mono",Consolas,"Noto Sans Mono",monospace;

  --fs-12:12px;
  --fs-14:14px;
  --fs-17:17px;
  --fs-22:22px;
  --fs-34:34px;
  --fs-56:56px;
  --fs-88:88px;

  --maxw:1280px;
  --gutter:clamp(16px,3vw,32px);
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:700;line-height:1.25}

@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

body{
  min-height:100vh;
  background:var(--ink-900);
  color:var(--text-100);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

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

/* ===== 跳转链接 ===== */
.skip-link{
  position:fixed;
  top:0;
  left:50%;
  z-index:200;
  transform:translate(-50%,-130%);
  padding:10px 22px;
  background:var(--cyan);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0)}

/* ===== 命令栏 ===== */
.cmdbar{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(7,14,26,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-500);
  transition:background .2s var(--ease);
}
.cmdbar[data-compact]{background:rgba(7,14,26,.98)}

.cmdbar__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  max-width:var(--maxw);
  margin:0 auto;
  min-height:72px;
  padding:0 var(--gutter);
  transition:min-height .2s var(--ease);
}
.cmdbar[data-compact] .cmdbar__inner{min-height:56px}

.cmdbar__brand{
  display:flex;
  align-items:center;
  gap:14px;
  padding-right:18px;
  min-width:0;
}

.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  display:inline-grid;
  place-items:center;
  width:34px;
  height:34px;
  border:1px solid var(--cyan);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.brand:hover .brand__mark{background:var(--cyan);color:var(--ink-900)}
.brand__name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--text-100);
  white-space:nowrap;
}

.statusdot{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text-300);
  white-space:nowrap;
}
.statusdot__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  animation:pulse 2.6s ease-out infinite;
}
.statusdot__text{line-height:1}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(0,229,208,.45)}
  70%{box-shadow:0 0 0 7px rgba(0,229,208,0)}
  100%{box-shadow:0 0 0 0 rgba(0,229,208,0)}
}

/* 移动按钮 */
.navbtn{
  display:none;
  align-items:center;
  gap:10px;
  min-height:44px;
  margin-left:auto;
  padding:0 12px;
  border:1px solid var(--line-500);
  color:var(--text-100);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.navbtn:hover{border-color:var(--cyan);color:var(--cyan)}
.navbtn__label{font-size:12px;letter-spacing:.12em}
.navbtn__bars{position:relative;display:block;width:16px;height:10px}
.navbtn__bars::before,
.navbtn__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .18s var(--ease),top .18s var(--ease);
}
.navbtn__bars::before{top:0}
.navbtn__bars::after{top:8px}
.cmdbar[data-open] .navbtn__bars::before{top:4px;transform:rotate(45deg)}
.cmdbar[data-open] .navbtn__bars::after{top:4px;transform:rotate(-45deg)}

/* 频道导航 */
.nav{
  display:flex;
  flex:1 1 auto;
  align-items:center;
  justify-content:center;
  min-width:0;
}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav__item{display:flex}
.nav__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--text-300);
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.nav__link:hover{color:var(--text-100);background:var(--ink-800)}
.nav__link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}

/* 右侧行动区 */
.cmdbar__act{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
  padding-left:18px;
}
.cmdbar__notice{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--orange);
  white-space:nowrap;
}
.cmdbar__notice::before{
  content:"";
  display:block;
  width:6px;
  height:6px;
  background:var(--orange);
}

/* 滚动刻度条 */
.cmdbar__progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(43,59,82,.55);
  pointer-events:none;
}
.cmdbar__progressfill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  background:var(--ink-700);
  border:1px solid var(--line-500);
  color:var(--text-100);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  text-align:center;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn:hover{background:var(--ink-800);border-color:var(--cyan);color:var(--cyan)}
.btn--signal{
  background:var(--orange);
  border-color:var(--orange);
  color:#120A05;
}
.btn--signal:hover{
  background:#FF9358;
  border-color:#FF9358;
  color:#120A05;
}
.btn--ghost{
  background:transparent;
  border-color:var(--line-500);
  color:var(--text-300);
}
.btn--ghost:hover{background:transparent;border-color:var(--cyan);color:var(--cyan)}
.btn--block{width:100%}

/* ===== 结构工具 ===== */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.rule{
  height:1px;
  background:var(--line-500);
  border:0;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
}
.num,
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.muted{color:var(--text-300)}
.small{font-size:13px;letter-spacing:.04em}

.section-index{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(48px,7vw,96px);
  line-height:.9;
  letter-spacing:-.02em;
  color:rgba(0,229,208,.18);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-500);
  background:var(--ink-800);
  color:var(--text-300);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag--live{border-color:rgba(0,229,208,.5);color:var(--cyan)}
.tag--alert{border-color:rgba(255,122,47,.5);color:var(--orange)}

.surface{
  background:var(--ink-800);
  border:1px solid var(--line-500);
  padding:clamp(20px,3vw,28px);
}
.surface--paper{
  background:var(--paper-200);
  border-color:rgba(18,32,47,.16);
  color:var(--paper-ink);
}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:20px 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text-300);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line-500)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--text-100)}

/* 网格 */
.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* 长读排版 */
.prose{
  max-width:34em;
  font-size:17px;
  line-height:1.9;
  color:var(--text-100);
}
.prose > * + *{margin-top:1.1em}
.prose h2{
  margin-top:2em;
  font-size:22px;
  line-height:1.45;
  letter-spacing:.02em;
}
.prose h3{
  margin-top:1.6em;
  font-size:17px;
  letter-spacing:.04em;
  color:var(--cyan);
}
.prose p{color:inherit}
.prose strong{font-weight:700;color:inherit}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(0,229,208,.4);
}
.prose ul,
.prose ol{padding-left:0}
.prose li{
  position:relative;
  padding-left:22px;
}
.prose li + li{margin-top:.6em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:10px;
  height:1px;
  background:var(--cyan);
}
.prose ol{counter-reset:prose}
.prose ol li{counter-increment:prose}
.prose ol li::before{
  content:counter(prose,decimal-leading-zero);
  top:.15em;
  width:auto;
  height:auto;
  background:none;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--cyan);
}
.prose--paper{
  background:var(--paper-200);
  color:var(--paper-ink);
  padding:clamp(24px,4vw,48px);
}
.prose--paper h2,
.prose--paper h3{color:var(--paper-ink)}
.prose--paper ul li::before{background:var(--paper-ink)}
.prose--paper ol li::before{color:var(--paper-ink)}

/* 图片容器基础规则（页面阶段放置占位或 <img>） */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line-500);
  background:linear-gradient(140deg,var(--ink-800) 0%,var(--ink-700) 58%,#0A1826 100%);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:4 / 5}
.media--square{aspect-ratio:1 / 1}
.media__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:16px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:rgba(147,163,179,.6);
}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-300);
}

/* ===== 页脚 ===== */
.sitefoot{
  margin-top:clamp(64px,9vw,112px);
  background:var(--ink-800);
  border-top:1px solid var(--line-500);
  color:var(--text-300);
}
.sitefoot__grid{
  display:grid;
  grid-template-columns:minmax(220px,1.35fr) 1fr 1fr 1fr;
  gap:clamp(28px,4vw,48px);
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 0;
}
.sitefoot__lead,
.sitefoot__nav,
.sitefoot__contact,
.sitefoot__legal{min-width:0}

.sitefoot__brand{
  display:block;
  font-family:var(--font-display);
  font-size:26px;
  font-weight:800;
  letter-spacing:.16em;
  color:var(--text-100);
}
.sitefoot__brand span{
  display:block;
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.24em;
  color:var(--cyan);
}
.sitefoot__tagline{
  margin-top:16px;
  max-width:22ch;
  font-size:14px;
  line-height:1.8;
  color:var(--text-300);
}

.sitefoot__label{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--cyan);
}
.sitefoot__list{display:grid;gap:9px}
.sitefoot__link{
  font-size:14px;
  color:var(--text-300);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.sitefoot__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

.sitefoot__mono{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  color:var(--text-100);
  word-break:break-word;
}
.sitefoot__addr{
  margin-top:6px;
  font-size:14px;
  line-height:1.7;
  color:var(--text-300);
}
.sitefoot__note{
  margin-top:12px;
  max-width:30ch;
  font-size:12px;
  line-height:1.7;
  color:var(--text-300);
  opacity:.78;
}
.sitefoot__icp{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--text-300);
}
.sitefoot__icp span{margin-right:8px;letter-spacing:.08em}

.sitefoot__base{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  max-width:var(--maxw);
  margin:clamp(32px,5vw,48px) auto 0;
  padding:18px var(--gutter) 28px;
  border-top:1px solid var(--line-500);
}
.sitefoot__updated,
.sitefoot__copy{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-300);
}

/* ===== 响应式 ===== */
@media (max-width:1180px){
  .cmdbar__notice{display:none}
}

@media (max-width:980px){
  .navbtn{display:inline-flex}
  .nav{
    order:10;
    flex-basis:100%;
    display:none;
    justify-content:flex-start;
    margin-inline:calc(var(--gutter) * -1);
    padding-inline:var(--gutter);
    border-top:1px solid var(--line-500);
  }
  .cmdbar[data-open] .nav{display:block}
  .nav__list{
    gap:0;
    padding-block:4px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .nav__link{
    min-height:44px;
    padding:0 12px;
    font-size:14px;
  }
  .cmdbar__inner,
  .cmdbar[data-compact] .cmdbar__inner{min-height:64px}

  .sitefoot__grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
  .sitefoot__lead{grid-column:1 / -1}

  .grid--3,
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  .brand__name{font-size:16px;letter-spacing:.08em}
  .statusdot__text{display:none}
  .cmdbar__act{padding-left:10px;gap:8px}
  .cmdbar__act .btn{padding:0 14px;font-size:13px;letter-spacing:.06em}

  .sitefoot__grid{grid-template-columns:1fr}
  .sitefoot__lead{grid-column:auto}

  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}

  .prose{font-size:16px}
  .breadcrumb{padding:14px 0}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  .statusdot__dot{animation:none;box-shadow:0 0 0 3px rgba(0,229,208,.18)}
}