/* ==========================================================================
   echo-bifa.com.cn — 必发赛场 共享样式表 /assets/site.css
   深空黑底 · 荧光绿强调 · 切角数据面板 · 非对称编辑部网格
   ========================================================================== */

:root{
  --ink:#07090C;
  --carbon:#0F1319;
  --graphite:#1A2028;
  --fog:#E9EEF3;
  --stone:#98A4B0;
  --lime:#B6FF3B;
  --lime-soft:#D9FF9C;
  --blue:#3F7DFF;
  --blue-deep:#14315E;
  --gold:#F3B845;

  --line:rgba(63,125,255,.24);
  --line-soft:rgba(152,164,176,.18);
  --shell:1240px;
  --gutter:20px;
  --cut:24px;
  --cut-sm:16px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular","Cascadia Mono",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,
h1,h2,h3,h4,h5,p,
ul,ol,li,figure,blockquote,dl,dd{margin:0;}

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

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

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

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

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

/* ---------- base ---------- */
body{
  min-height:100vh;
  background:
    radial-gradient(1100px 620px at 84% -8%, rgba(63,125,255,.16), transparent 62%),
    radial-gradient(900px 520px at 4% 8%, rgba(182,255,59,.055), transparent 58%),
    var(--ink);
  color:var(--fog);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4{line-height:1.2;font-weight:800;}

::selection{background:var(--lime);color:#07090C;}

/* ---------- containers ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

.shell--narrow{max-width:820px;}

.section{
  position:relative;
  padding-top:clamp(48px,7vw,96px);
  padding-bottom:clamp(48px,7vw,96px);
}

.section--carbon{background:var(--carbon);}

.slice{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,rgba(63,125,255,.55),rgba(182,255,59,.35),transparent);
}

/* ---------- asymmetric grid ---------- */
.grid12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}

.col-main{grid-column:1 / span 8;}
.col-aside{grid-column:10 / span 3;}

.stack{display:grid;gap:18px;}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:14px;}

/* ---------- typography ---------- */
.display{
  font-size:clamp(48px,9vw,152px);
  font-weight:200;
  line-height:.94;
  letter-spacing:-.045em;
}

.section-title{
  font-size:clamp(24px,3.4vw,36px);
  font-weight:800;
  letter-spacing:-.012em;
}

.lede{
  max-width:48ch;
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;
  color:rgba(233,238,243,.82);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--stone);
}

.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--lime);
  flex:0 0 auto;
}

.mono{
  font-family:var(--font-mono);
  letter-spacing:.02em;
}

.data-num{
  font-family:var(--font-mono);
  font-weight:500;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.link{
  color:var(--blue);
  border-bottom:1px solid rgba(63,125,255,.42);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}

.link:hover{color:var(--lime);border-bottom-color:var(--lime);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  white-space:nowrap;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}

.btn--primary{
  background:var(--lime);
  color:#07090C;
}

.btn--primary:hover,
.btn--primary:focus-visible{background:var(--lime-soft);}

.btn--ghost{
  background:transparent;
  color:var(--fog);
  box-shadow:inset 0 0 0 1px rgba(233,238,243,.3);
}

.btn--ghost:hover,
.btn--ghost:focus-visible{
  color:var(--lime);
  box-shadow:inset 0 0 0 1px var(--lime);
}

/* ---------- panels ---------- */
.panel{
  position:relative;
  padding:26px 24px;
  background:
    linear-gradient(158deg,rgba(63,125,255,.18),rgba(63,125,255,0) 46%),
    var(--graphite);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}

.panel--lime{box-shadow:inset 3px 0 0 var(--lime);}

.stat{
  padding:18px 20px;
  background:var(--graphite);
  clip-path:polygon(0 0,calc(100% - var(--cut-sm)) 0,100% var(--cut-sm),100% 100%,0 100%);
}

.stat-value{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(24px,3vw,34px);
  font-weight:500;
  line-height:1.1;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}

.stat-label{
  display:block;
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--stone);
}

/* ---------- media frames ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:linear-gradient(150deg,var(--blue-deep),var(--carbon) 56%,var(--ink));
  clip-path:polygon(0 0,calc(100% - 30px) 0,100% 30px,100% 100%,0 100%);
}

.media > img,
.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(233,238,243,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(233,238,243,.05) 1px,transparent 1px);
  background-size:56px 56px;
}

.media--wide{aspect-ratio:16 / 9;}
.media--band{aspect-ratio:21 / 9;}
.media--tall{aspect-ratio:3 / 4;}

.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--stone);
}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--stone);
}

.crumb li{display:flex;align-items:center;}

.crumb li::after{
  content:"/";
  margin:0 10px;
  color:rgba(152,164,176,.42);
}

.crumb li:last-child::after{display:none;}

.crumb a{transition:color .18s var(--ease);}
.crumb a:hover{color:var(--lime);}
.crumb [aria-current="page"]{color:var(--fog);}

/* ---------- segmented tabs ---------- */
.segmented{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  border-bottom:1px solid var(--line-soft);
}

.segmented [role="tab"]{
  padding:11px 16px;
  margin-bottom:-1px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--stone);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}

.segmented [role="tab"]:hover{color:var(--fog);}

.segmented [role="tab"][aria-selected="true"]{
  color:var(--lime);
  border-bottom-color:var(--lime);
}

.tabpanel[hidden]{display:none;}

/* ==========================================================================
   HEADER — 紧凑命令栏
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,9,12,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}

.skip-link{
  position:absolute;
  left:12px;
  top:-72px;
  z-index:120;
  padding:10px 16px;
  background:var(--lime);
  color:#07090C;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  transition:top .18s var(--ease);
}

.skip-link:focus{top:8px;}

.cmdbar{
  display:flex;
  align-items:center;
  gap:16px;
  width:100%;
  max-width:var(--shell);
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
  min-height:62px;
}

/* brand */
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.brand-pulse{
  position:relative;
  width:9px;
  height:9px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--lime);
}

.brand-pulse::after{
  content:"";
  position:absolute;
  inset:-5px;
  border-radius:50%;
  border:1px solid rgba(182,255,59,.62);
  animation:brandPulse 2.8s ease-out infinite;
}

@keyframes brandPulse{
  0%{transform:scale(.5);opacity:.9;}
  70%{transform:scale(1.1);opacity:0;}
  100%{transform:scale(1.1);opacity:0;}
}

.brand-text{display:flex;align-items:baseline;gap:10px;}

.brand-name{
  font-size:19px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--fog);
}

.brand-tag{
  padding-left:10px;
  border-left:1px solid rgba(152,164,176,.32);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--stone);
}

/* nav */
.site-nav{
  flex:1 1 auto;
  display:flex;
  justify-content:center;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}

.nav-list a{
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:9px 11px;
  font-size:14px;
  color:var(--stone);
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease);
}

.nav-list a:hover{
  color:var(--fog);
  background:rgba(63,125,255,.16);
}

.nav-list a[aria-current="page"]{
  color:var(--fog);
  background:rgba(182,255,59,.1);
  box-shadow:inset 0 -2px 0 var(--lime);
}

.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--stone);
  opacity:.8;
}

.nav-list a[aria-current="page"] .nav-idx{color:var(--lime);opacity:1;}

/* utilities */
.cmd-utils{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.util{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--stone);
  box-shadow:inset 0 0 0 1px rgba(152,164,176,.28);
  transition:color .2s var(--ease),box-shadow .2s var(--ease);
}

.util:hover,
.util:focus-visible{
  color:var(--lime);
  box-shadow:inset 0 0 0 1px var(--lime);
}

.util-icon{width:15px;height:15px;flex:0 0 auto;}

/* mobile toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--fog);
  box-shadow:inset 0 0 0 1px rgba(233,238,243,.26);
}

.nav-toggle-bars{
  position:relative;
  width:16px;
  height:10px;
  flex:0 0 auto;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:var(--lime);
  transition:transform .24s var(--ease),top .24s var(--ease);
}

.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{top:8px;}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:4px;transform:rotate(24deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:4px;transform:rotate(-24deg);}

/* scroll progress */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  overflow:hidden;
}

.scroll-progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--blue),var(--lime));
  transition:width .12s linear;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,6vw,88px);
  background:var(--carbon);
  border-top:1px solid var(--line);
}

.site-footer::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--lime),rgba(63,125,255,.65) 44%,rgba(63,125,255,0));
}

.footer-top,
.footer-contact,
.footer-note,
.footer-bottom{
  width:100%;
  max-width:var(--shell);
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:32px;
  padding-top:clamp(40px,6vw,76px);
  padding-bottom:34px;
}

.footer-mark{
  font-size:26px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--fog);
}

.footer-summary{
  margin-top:12px;
  max-width:38ch;
  font-size:15px;
  line-height:1.7;
  color:var(--stone);
}

.footer-kicker{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--lime);
}

.footer-col-title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--fog);
}

.footer-links{
  display:grid;
  gap:10px;
  margin-top:16px;
}

.footer-links a{
  font-size:15px;
  color:var(--stone);
  transition:color .18s var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible{color:var(--lime);}

.footer-contact{
  display:flex;
  flex-wrap:wrap;
  gap:10px 34px;
  padding-top:22px;
  padding-bottom:12px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--stone);
}

.footer-key{
  margin-right:9px;
  color:var(--blue);
}

.footer-note{
  padding-bottom:22px;
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  color:var(--stone);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:18px;
  padding-bottom:26px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--stone);
}

.footer-host{color:rgba(152,164,176,.75);}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:1024px){
  .footer-top{grid-template-columns:minmax(0,1.3fr) repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .col-main{grid-column:1 / span 7;}
  .col-aside{grid-column:9 / span 4;}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex;}

  .brand-tag{display:none;}

  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:block;
    padding:6px var(--gutter) 22px;
    background:var(--carbon);
    border-bottom:1px solid var(--line);
    max-height:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .3s var(--ease),visibility .3s var(--ease);
  }

  .site-nav[data-open]{
    max-height:440px;
    visibility:visible;
    overflow-y:auto;
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }

  .nav-list a{
    padding:14px 4px;
    font-size:16px;
    border-bottom:1px solid var(--line-soft);
  }

  .nav-list a:hover{background:transparent;color:var(--lime);}

  .nav-list a[aria-current="page"]{
    padding-left:12px;
    background:rgba(182,255,59,.07);
    box-shadow:inset 3px 0 0 var(--lime);
  }

  .grid12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-main{grid-column:1 / -1;}
  .col-aside{grid-column:1 / -1;}
}

@media (max-width:720px){
  body{font-size:16px;}

  .cmdbar{min-height:56px;gap:10px;}

  .brand-name{font-size:17px;}

  .util--talk{display:none;}

  .util-label{display:none;}

  .footer-top{
    grid-template-columns:minmax(0,1fr);
    gap:28px;
  }

  .footer-contact{flex-direction:column;gap:8px;}

  .footer-bottom{flex-direction:column;gap:6px;}
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}

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

  .brand-pulse::after{opacity:0;}

  .scroll-progress-bar{transition:none;}
}