/* ==========================================================================
   博业赛场 · echo-boye.com.cn
   共享样式表 /assets/site.css
   设计母题：赛场夜灯下的数据指挥中心
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --deep:#061A2E;
  --midnight:#0C2A4A;
  --echo:#1B4B7A;
  --ice:#F3F7FF;
  --pure:#FFFFFF;
  --orange:#FF5B35;
  --ember:#FF9A4D;
  --signal:#B7FF4A;
  --cyan:#35D6FF;
  --violet:#7A6CFF;
  --slate:#9FB3CA;
  --mint:#22C9A3;
  --ink:#0A1A2F;

  --line:rgba(159,179,202,.18);
  --line-strong:rgba(159,179,202,.34);

  --rail-w:156px;
  --header-h:64px;
  --gutter:clamp(18px,4vw,52px);
  --maxw:1280px;

  --r-s:10px;
  --r-m:18px;
  --r-l:30px;

  --font-display:"Archivo Black","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

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

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

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

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--ice);
  background-color:var(--deep);
  background-image:
    radial-gradient(1200px 640px at 8% -12%, rgba(27,75,122,.62), transparent 62%),
    radial-gradient(980px 520px at 104% 4%, rgba(122,108,255,.20), transparent 66%),
    radial-gradient(760px 460px at 62% 118%, rgba(255,91,53,.10), transparent 70%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
a{color:var(--cyan);text-decoration:none;}
a:hover{color:var(--signal);}
button{font:inherit;color:inherit;background:none;border:0;}
table{border-collapse:collapse;width:100%;}

:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
  border-radius:4px;
}

/* 主内容区避让固定轨道 */
main{
  display:block;
  padding-left:var(--rail-w);
}
#main-content{scroll-margin-top:24px;}

/* ---------- 3. 排版工具 ---------- */
.headline{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.02;
  text-wrap:balance;
}
.h1{font-size:clamp(38px,6.4vw,86px);}
.h2{font-size:clamp(26px,3.6vw,46px);line-height:1.1;}
.h3{font-size:clamp(19px,1.8vw,24px);line-height:1.32;letter-spacing:-.01em;}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--orange);
  flex:none;
}

.lead{
  font-size:clamp(15px,1.35vw,18px);
  line-height:1.8;
  color:#CFDCEC;
  max-width:68ch;
}
.muted{color:var(--slate);}
.num{
  font-family:var(--font-mono);
  font-weight:600;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.6;
  color:var(--slate);
}
.tag--signal{background:var(--signal);border-color:transparent;color:var(--ink);}
.tag--orange{background:var(--orange);border-color:transparent;color:#220A03;}

/* ---------- 4. 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(44px,7vw,96px);position:relative;}

.section--light{
  background:linear-gradient(170deg,var(--ice) 0%,#E3EDFB 100%);
  color:var(--ink);
}
.section--light .lead{color:#2B4059;}
.section--light .muted{color:#4B6379;}
.section--light .eyebrow{color:#1B4B7A;}
.section--light .tag{border-color:rgba(10,26,47,.22);color:#3A5673;}
.section--light .headline{color:var(--ink);}

.surface{
  position:relative;
  background:linear-gradient(160deg,rgba(27,75,122,.55),rgba(12,42,74,.78));
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:clamp(16px,2.2vw,30px);
}
.surface--light{
  background:var(--pure);
  border-color:rgba(10,26,47,.10);
  color:var(--ink);
  box-shadow:0 22px 48px -34px rgba(6,26,46,.55);
}

/* ---------- 5. 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),
             color .22s var(--ease),border-color .22s var(--ease),
             box-shadow .22s var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn--primary{
  background:linear-gradient(135deg,var(--orange),var(--ember));
  color:#220A03;
  box-shadow:0 14px 30px -18px rgba(255,91,53,.95);
}
.btn--primary:hover{color:#220A03;box-shadow:0 18px 36px -16px rgba(255,91,53,1);}
.btn--ghost{
  border-color:var(--line-strong);
  background:rgba(53,214,255,.06);
  color:var(--ice);
}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(53,214,255,.16);color:var(--ice);}
.btn--signal{background:var(--signal);color:var(--ink);}
.btn--signal:hover{color:var(--ink);}

/* ---------- 7. 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--slate);
}
.crumbs a{color:var(--slate);}
.crumbs a:hover{color:var(--ice);}
.crumbs__sep{opacity:.45;}
.crumbs [aria-current="page"]{color:var(--orange);}

/* ---------- 8. 正文 ---------- */
.prose{
  max-width:72ch;
  font-size:1.02rem;
  line-height:1.85;
  color:#D6E2F0;
}
.prose > * + *{margin-top:1.05em;}
.prose h2{
  font-family:var(--font-display);
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.2;
  letter-spacing:-.015em;
  margin-top:1.9em;
  color:var(--ice);
}
.prose h3{
  font-size:clamp(18px,1.7vw,21px);
  font-weight:700;
  margin-top:1.6em;
  color:var(--ice);
}
.prose ul,.prose ol{list-style:disc;padding-left:1.25em;}
.prose ol{list-style:decimal;}
.prose li + li{margin-top:.5em;}
.prose strong{color:var(--signal);font-weight:700;}
.prose a{text-decoration:underline;text-underline-offset:3px;}

/* ---------- 9. 图片容器基础规则 ---------- */
.figure{
  position:relative;
  margin:0;
  border-radius:var(--r-m);
  overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(27,75,122,.72),rgba(12,42,74,.92));
}
.figure__media{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  display:flex;
  align-items:center;
  justify-content:center;
  background-image:
    repeating-linear-gradient(0deg,rgba(53,214,255,.10) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(53,214,255,.10) 0 1px,transparent 1px 44px),
    radial-gradient(circle at 28% 24%,rgba(183,255,74,.22),transparent 46%),
    radial-gradient(circle at 76% 68%,rgba(255,91,53,.24),transparent 52%);
}
.figure__media > img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(6,26,46,0) 55%,rgba(6,26,46,.55) 100%);
}
.figure--wide .figure__media{aspect-ratio:21/9;}
.figure--tall .figure__media{aspect-ratio:3/4;}
.figure__cap{
  position:relative;
  padding:11px 16px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--slate);
  background:rgba(6,26,46,.65);
}

/* ---------- 10. 页头 · 侧边轨道 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  transform:translate(-50%,-160%);
  z-index:200;
  padding:10px 20px;
  border-radius:999px;
  background:var(--signal);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);color:var(--ink);}

.site-header{
  position:fixed;
  inset-block-start:0;
  inset-block-end:0;
  inset-inline-start:0;
  width:var(--rail-w);
  z-index:80;
  background:linear-gradient(180deg,rgba(12,42,74,.94) 0%,rgba(6,26,46,.98) 100%);
  border-inline-end:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.site-header::before{
  content:"";
  position:absolute;
  inset-block-start:0;
  inset-inline-start:0;
  width:100%;
  height:120px;
  background:radial-gradient(120px 100px at 50% 0%,rgba(53,214,255,.22),transparent 72%);
  pointer-events:none;
}

.rail{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:20px;
  height:100%;
  padding:22px 20px 26px;
}

/* 品牌 */
.brand{
  display:flex;
  flex-direction:column;
  gap:10px;
  text-decoration:none;
  color:var(--ice);
}
.brand:hover{color:var(--ice);text-decoration:none;}
.brand__mark{
  position:relative;
  display:block;
  width:38px;
  height:38px;
  flex:none;
  border-radius:12px;
  background:linear-gradient(140deg,var(--orange) 0%,var(--ember) 52%,var(--violet) 100%);
  box-shadow:inset 0 0 0 1px rgba(243,247,255,.2),0 10px 22px -14px rgba(255,91,53,.95);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:11px;
  border-radius:50%;
  background:var(--deep);
  box-shadow:inset 0 0 0 2px rgba(183,255,74,.9);
}
.brand__text{display:block;}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-size:16px;
  line-height:1.15;
  letter-spacing:.02em;
  color:var(--ice);
}
.brand__sub{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.24em;
  color:var(--slate);
}

/* 移动端开合按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 15px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  background:rgba(53,214,255,.09);
  color:var(--ice);
  font-size:13px;
  font-weight:700;
  cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(53,214,255,.18);border-color:var(--cyan);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle__bars::before{top:-5px;}
.nav-toggle__bars::after{top:5px;}
.nav-toggle__text{letter-spacing:.06em;}

/* 导航 */
.site-nav{flex:1 1 auto;min-height:0;}
.site-nav__list{display:flex;flex-direction:column;gap:2px;}
.site-nav__item{position:relative;}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:8px;
  padding:9px 9px 9px 12px;
  border-radius:9px;
  font-size:13px;
  line-height:1.35;
  color:var(--slate);
  text-decoration:none;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:3px;
  height:0;
  border-radius:3px;
  background:var(--orange);
  transform:translateY(-50%);
  transition:height .26s var(--ease);
}
.site-nav__link:hover{color:var(--ice);background:rgba(53,214,255,.09);text-decoration:none;}
.site-nav__no{
  font-family:var(--font-mono);
  font-size:9px;
  font-weight:600;
  letter-spacing:.06em;
  color:rgba(159,179,202,.66);
  transition:color .22s var(--ease);
}
.site-nav__label{display:block;}
.site-nav__link[aria-current="page"]{
  color:var(--ice);
  background:rgba(255,91,53,.14);
  text-decoration:none;
}
.site-nav__link[aria-current="page"]::before{height:62%;}
.site-nav__link[aria-current="page"] .site-nav__no{color:var(--orange);}

/* 轨道行动 */
.rail__cta{
  display:block;
  margin-top:auto;
  padding:11px 8px;
  border-radius:11px;
  text-align:center;
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  color:#220A03;
  background:linear-gradient(135deg,var(--orange),var(--ember));
  box-shadow:0 12px 26px -18px rgba(255,91,53,1);
  text-decoration:none;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.rail__cta:hover{
  color:#220A03;
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 16px 30px -16px rgba(255,91,53,1);
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-inline-start:var(--rail-w);
  padding-top:clamp(46px,6vw,86px);
  background:linear-gradient(180deg,#08213B 0%,#061A2E 58%,#040F1B 100%);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset-block-start:0;
  inset-inline:0;
  height:3px;
  background:linear-gradient(90deg,var(--orange) 0%,var(--ember) 32%,var(--signal) 68%,var(--cyan) 100%);
  opacity:.85;
}

.footer-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,.9fr) minmax(0,1.7fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(30px,4vw,54px);
}

.footer-brand{display:flex;flex-direction:column;gap:14px;}
.footer-brand__link{
  display:inline-flex;
  align-items:center;
  gap:11px;
  color:var(--ice);
  text-decoration:none;
}
.footer-brand__link:hover{color:var(--ice);text-decoration:none;}
.footer-brand__mark{
  display:block;
  width:30px;
  height:30px;
  flex:none;
  border-radius:9px;
  background:linear-gradient(140deg,var(--orange),var(--violet));
  box-shadow:inset 0 0 0 1px rgba(243,247,255,.22);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:20px;
  letter-spacing:.01em;
}
.footer-brand__note{
  max-width:26ch;
  font-size:13px;
  line-height:1.8;
  color:var(--slate);
}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col{min-width:0;}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-col__list li + li{margin-top:11px;}
.footer-col__list a{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:#C7D6E8;
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-col__list a:hover{color:var(--signal);text-decoration:none;}
.footer-col__list--plain li{
  font-size:13px;
  line-height:1.7;
  color:#C7D6E8;
  word-break:break-word;
}
.footer-label{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:rgba(159,179,202,.7);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  padding-block:22px;
  border-top:1px solid var(--line);
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  color:var(--slate);
}
.footer-legal--dim{color:rgba(159,179,202,.62);}

.footer-stamp{
  margin:0;
  padding-inline:var(--gutter);
  font-family:var(--font-display);
  font-size:clamp(52px,12.5vw,158px);
  line-height:.82;
  letter-spacing:-.045em;
  white-space:nowrap;
  color:rgba(159,179,202,.085);
  transform:translateY(.1em);
  user-select:none;
  pointer-events:none;
}

/* ---------- 12. 滚动进度（JS 注入） ---------- */
.scroll-progress{
  position:fixed;
  inset-block-start:0;
  inset-inline:0;
  height:3px;
  z-index:95;
  pointer-events:none;
  background:rgba(159,179,202,.12);
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--orange),var(--ember) 42%,var(--signal) 100%);
  box-shadow:0 0 14px rgba(255,91,53,.55);
  transition:width .08s linear;
}

/* ---------- 13. 滚动显现 ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .68s var(--ease),transform .68s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.js-ready [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 14. 响应式：中宽轨道收窄 ---------- */
@media (min-width:961px) and (max-width:1240px){
  :root{--rail-w:140px;}
  .rail{padding:20px 16px 24px;}
  .site-nav__link{font-size:12.5px;}
}

/* ---------- 15. 响应式：≤960px 顶栏 + 抽屉 ---------- */
@media (max-width:960px){
  :root{--header-h:64px;}

  main{
    padding-left:0;
    padding-top:var(--header-h);
  }

  .site-header{
    inset-block-start:0;
    inset-block-end:auto;
    inset-inline-start:0;
    width:100%;
    height:var(--header-h);
    border-inline-end:0;
    border-bottom:1px solid var(--line-strong);
    background:linear-gradient(90deg,rgba(12,42,74,.97) 0%,rgba(6,26,46,.97) 100%);
  }
  .site-header::before{display:none;}

  .rail{
    flex-direction:row;
    align-items:center;
    gap:12px;
    height:var(--header-h);
    padding:0 16px;
    overflow:visible;
  }

  .brand{
    flex:1 1 auto;
    flex-direction:row;
    align-items:center;
    gap:10px;
    min-width:0;
  }
  .brand__mark{width:32px;height:32px;border-radius:10px;}
  .brand__mark::after{inset:9px;}
  .brand__name{font-size:15px;}
  .brand__sub{display:none;}

  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    inset-inline:0;
    top:var(--header-h);
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    padding:12px 16px 26px;
    background:linear-gradient(180deg,rgba(12,42,74,.99) 0%,rgba(6,26,46,.99) 72%);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 26px 52px -26px rgba(0,0,0,.85);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
  }
  .site-nav__list{gap:4px;}
  .site-nav__link{
    font-size:16px;
    padding:14px 16px;
    border-radius:12px;
  }
  .site-nav__no{font-size:10px;}
  .site-nav__link[aria-current="page"]::before{height:56%;}

  .site-header[data-open="true"] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .site-header[data-open="true"] .nav-toggle{
    border-color:var(--orange);
    background:rgba(255,91,53,.18);
  }
  .site-header[data-open="true"] .nav-toggle__bars{background:transparent;}
  .site-header[data-open="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);}
  .site-header[data-open="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);}

  .rail__cta{display:none;}

  .site-footer{margin-inline-start:0;}
  .footer-top{grid-template-columns:1fr;}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:620px){
  .grid--2,
  .grid--3,
  .grid--12{grid-template-columns:1fr;}
  .footer-nav{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;}
  .btn + .btn{margin-top:10px;}
}

@media (min-width:621px) and (max-width:1100px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none;}
  .scroll-progress__bar{transition:none;}
  .btn:hover{transform:none;}
}