/* =========================================================
   博鱼体育 · 战术拆解室  /assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、基础组件
   ========================================================= */

/* ---------- 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,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
::selection{background:var(--signal);color:#0A1A2F}

/* ---------- 2. Tokens ---------- */
:root{
  --night:#0A1A2F;
  --board:#12304F;
  --glass:#1B3E63;
  --signal:#FF6A2B;
  --gold:#E8B54A;
  --mint:#2FE0B0;
  --rock:#9AA7B2;
  --rock-deep:#6E7B87;
  --moss:#4E6B5A;
  --clay:#B8684A;
  --paper:#F2EDE4;

  --line:rgba(154,167,178,.20);
  --line-strong:rgba(154,167,178,.38);
  --glass-bg:rgba(27,62,99,.42);
  --ink-soft:rgba(242,237,228,.78);
  --ink-dim:rgba(242,237,228,.56);

  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei UI","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"DejaVu Sans Mono","Liberation Mono",monospace;

  --wrap:1240px;
  --gap:24px;
  --header-h:64px;
  --dur:.2s;
  --ease:cubic-bezier(.2,.6,.2,1);
}
@media (min-width:900px){
  :root{--header-h:104px;--gap:28px}
}

/* ---------- 3. Base & 中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  color:var(--paper);
  background-color:var(--night);
  background-image:
    radial-gradient(1200px 620px at 10% -10%, rgba(27,62,99,.9), transparent 62%),
    radial-gradient(900px 520px at 98% 2%, rgba(78,107,90,.3), transparent 60%),
    linear-gradient(180deg,#0A1A2F 0%,#0B2039 46%,#0A1A2F 100%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(154,167,178,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154,167,178,.055) 1px, transparent 1px);
  background-size:96px 96px;
  -webkit-mask-image:radial-gradient(130% 90% at 50% 0%, #000 22%, transparent 78%);
  mask-image:radial-gradient(130% 90% at 50% 0%, #000 22%, transparent 78%);
}
main,.site-footer{position:relative;z-index:1}
main{display:block;padding-top:var(--header-h)}
main[data-cover]{padding-top:0}

h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:800;line-height:1.2;letter-spacing:.01em;color:var(--paper)}
h1{font-size:clamp(30px,5.2vw,56px);line-height:1.12;letter-spacing:-.005em}
h2{font-size:clamp(22px,3.2vw,34px)}
h3{font-size:clamp(17px,2vw,21px)}
p{color:var(--ink-soft)}
strong{color:var(--paper);font-weight:700}

a.link{color:var(--mint);border-bottom:1px solid rgba(47,224,176,.35);transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
a.link:hover{color:var(--gold);border-color:rgba(232,181,74,.6)}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.team-en{font-family:var(--font-head);font-weight:800;text-transform:uppercase;letter-spacing:.18em;font-size:.86em}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mint);
}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.85;color:var(--ink-soft);max-width:58ch}
.muted{color:var(--rock)}
.accent{color:var(--gold)}
.t-outline{color:transparent;-webkit-text-stroke:1px rgba(242,237,228,.6)}
@supports not (-webkit-text-stroke:1px #000){.t-outline{color:var(--paper)}}

/* ---------- 4. 布局容器与网格 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(16px,4.2vw,40px)}
.section{padding-block:clamp(46px,7vw,88px)}
.section--tight{padding-block:clamp(28px,4.5vw,52px)}
.narrow{max-width:840px;margin-inline:auto}
.divider{height:1px;border:0;background:linear-gradient(90deg,var(--line-strong),transparent)}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(min(100%,168px),1fr))}

.split{display:grid;gap:clamp(24px,4vw,48px);grid-template-columns:minmax(0,1fr)}
@media (min-width:1000px){
  .split{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:start}
  .split--reverse{grid-template-columns:minmax(0,1fr) minmax(0,1.15fr)}
  .split--wide{grid-template-columns:minmax(0,1.7fr) minmax(260px,1fr)}
}

/* ---------- 5. 按钮 / 面包屑 / 标签 / 数字 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 20px;
  border:1px solid transparent;
  font-size:14px;font-weight:700;line-height:1;letter-spacing:.08em;
  white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--signal);color:#08131F}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--gold);color:#0A1A2F}
.btn--ghost{border-color:var(--line-strong);background:rgba(27,62,99,.28);color:var(--paper)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--signal);color:var(--signal);background:rgba(255,106,43,.08)}
.btn--block{width:100%}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--rock);
}
.crumbs a{color:var(--rock);transition:color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--mint)}
.crumbs [aria-current="page"]{color:var(--paper)}
.crumbs__sep{color:var(--rock-deep)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--rock);
  background:rgba(27,62,99,.32);
}
.tag--live{border-color:rgba(47,224,176,.5);color:var(--mint);background:rgba(47,224,176,.08)}
.tag--signal{border-color:rgba(255,106,43,.55);color:var(--signal);background:rgba(255,106,43,.1)}
.tag--gold{border-color:rgba(232,181,74,.5);color:var(--gold);background:rgba(232,181,74,.09)}
.tag--moss{border-color:rgba(78,107,90,.75);color:#9DBBA6;background:rgba(78,107,90,.22)}
.tag--clay{border-color:rgba(184,104,74,.6);color:#DFA187;background:rgba(184,104,74,.16)}

.stat{
  display:flex;flex-direction:column;gap:8px;
  padding:18px 20px;
  border-left:2px solid var(--signal);
  background:linear-gradient(180deg,rgba(27,62,99,.5),rgba(18,48,79,.32));
}
.stat__value{font-family:var(--font-mono);font-size:clamp(26px,4vw,40px);line-height:1;color:var(--gold);letter-spacing:.01em}
.stat__label{font-size:12px;letter-spacing:.12em;color:var(--rock)}
.stat__note{font-size:12px;color:var(--rock-deep)}

/* ---------- 6. 面板与章节 ---------- */
.panel{
  position:relative;
  padding:26px;
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(27,62,99,.5),rgba(18,48,79,.42));
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.panel::before{
  content:"";position:absolute;top:-1px;left:-1px;width:16px;height:16px;
  border-top:2px solid var(--signal);border-left:2px solid var(--signal);
}
.panel--flat{background:rgba(18,48,79,.42)}
.panel:hover{border-color:var(--line-strong)}
.panel__head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px}

.chapter{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px 20px;
  align-items:start;margin-bottom:28px;
}
.chapter__num{
  font-family:var(--font-mono);
  font-size:clamp(30px,5vw,54px);line-height:.9;
  color:transparent;-webkit-text-stroke:1px rgba(154,167,178,.62);
}
@supports not (-webkit-text-stroke:1px #000){.chapter__num{color:var(--rock)}}
.chapter__body{display:flex;flex-direction:column;gap:8px;padding-top:4px}
.chapter__title{font-size:clamp(20px,3vw,30px);font-weight:800}
.chapter__note{font-size:14px;color:var(--rock);max-width:60ch}

/* ---------- 7. 图文容器 ---------- */
.figure{position:relative;margin:0;overflow:hidden;border:1px solid var(--line);background:#0C2138}
.figure__media{
  display:block;width:100%;height:100%;object-fit:cover;
  aspect-ratio:16/9;
  filter:saturate(.72) contrast(1.06) brightness(.88);
}
.figure--wide .figure__media{aspect-ratio:21/9}
.figure--tall .figure__media{aspect-ratio:4/5}
.figure--square .figure__media{aspect-ratio:1/1}
.figure::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,26,47,.12) 0%,rgba(10,26,47,.34) 48%,rgba(10,26,47,.82) 100%);
}
.figure__cap{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:12px 16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--paper);
}
.figure__badge{position:absolute;top:12px;left:12px;z-index:2}
.ph{
  position:relative;
  aspect-ratio:16/9;
  background:
    radial-gradient(420px 220px at 78% 18%, rgba(255,106,43,.22), transparent 62%),
    linear-gradient(140deg,#12304F 0%,#0A1A2F 68%);
  overflow:hidden;
}
.ph::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(154,167,178,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154,167,178,.12) 1px, transparent 1px);
  background-size:44px 44px;
}
.ph::after{
  content:"";position:absolute;left:-10%;top:62%;width:120%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,176,.6),transparent);
  transform:rotate(-7deg);
}

/* ---------- 8. 正文排版 ---------- */
.prose{max-width:70ch;font-size:16.5px;line-height:1.85;color:var(--ink-soft)}
.prose p + p{margin-top:1em}
.prose h2{margin:1.9em 0 .6em;font-size:clamp(20px,2.6vw,26px)}
.prose h3{margin:1.5em 0 .5em}
.prose ul,.prose ol{margin:.8em 0;padding-left:1.3em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose li::marker{color:var(--signal)}
.prose blockquote{margin:1.4em 0;padding:14px 20px;border-left:2px solid var(--signal);background:rgba(27,62,99,.35);color:var(--paper)}

/* ---------- 9. 头部 ---------- */
.skip-link{
  position:fixed;left:16px;top:-70px;z-index:200;
  padding:10px 18px;background:var(--signal);color:#08131F;font-weight:700;font-size:14px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.site-header::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,26,47,.78),rgba(10,26,47,0));
  transition:opacity var(--dur) var(--ease);
}
.site-header.is-solid{
  background:rgba(10,26,47,.88);
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px rgba(4,12,24,.42);
  -webkit-backdrop-filter:blur(14px) saturate(1.1);
  backdrop-filter:blur(14px) saturate(1.1);
}
.site-header.is-solid::after{opacity:0}

.rail{display:none;border-bottom:1px solid rgba(154,167,178,.14);background:rgba(10,26,47,.5)}
.rail__inner{
  display:flex;align-items:center;gap:24px;height:32px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--rock);
}
.rail__brand{color:var(--mint)}
.rail__index{display:flex;align-items:center;gap:14px;color:var(--rock)}
.rail__index span{position:relative;padding-left:12px}
.rail__index span::before{
  content:"";position:absolute;left:0;top:50%;width:4px;height:4px;
  background:var(--signal);transform:translateY(-50%);
}
.rail__note{margin-left:auto;color:var(--rock-deep)}

.header__inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding-block:10px;
}

.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand__mark{
  position:relative;width:26px;height:26px;flex:none;
  background:linear-gradient(135deg,var(--signal),var(--gold));
  clip-path:polygon(0 0,100% 0,100% 64%,64% 100%,0 100%);
}
.brand__mark::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:rgba(10,26,47,.82);transform:translateX(-.5px)}
.brand__mark::after{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:rgba(10,26,47,.82);transform:translateY(-.5px)}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{font-family:var(--font-head);font-weight:800;font-size:17px;line-height:1.1;letter-spacing:.04em}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.28em;color:var(--mint);text-transform:uppercase}
.brand--footer .brand__name{font-size:20px}

.nav{display:flex;align-items:center;gap:clamp(14px,2vw,26px)}
.nav__list{display:flex;align-items:center;gap:clamp(12px,1.8vw,24px)}
.nav__link{
  position:relative;display:inline-block;padding:10px 2px;
  font-size:14px;letter-spacing:.06em;color:rgba(242,237,228,.76);
  transition:color var(--dur) var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:100%;bottom:4px;height:1px;
  background:var(--signal);transition:right .24s var(--ease);
}
.nav__link:hover,.nav__link:focus-visible{color:var(--paper)}
.nav__link:hover::after,.nav__link:focus-visible::after{right:0}
.nav__link[aria-current="page"]{color:var(--paper)}
.nav__link[aria-current="page"]::after{right:0}
.nav__cta{margin-left:4px}

.nav-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  width:46px;height:38px;flex:none;position:relative;z-index:80;
  border:1px solid var(--line-strong);
  background:rgba(27,62,99,.42);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--signal)}
.nav-toggle span{
  display:block;width:18px;height:1.5px;background:var(--paper);
  transition:transform var(--dur) var(--ease),opacity .16s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.nav-scrim{
  position:fixed;inset:0;z-index:64;
  background:rgba(6,16,30,.68);
  opacity:0;pointer-events:none;
  transition:opacity var(--dur) var(--ease);
}
.nav-scrim.is-open{opacity:1;pointer-events:auto}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(154,167,178,.14);
  overflow:hidden;
}
.scroll-progress span{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--signal),var(--gold));
  transform:scaleX(0);transform-origin:0 50%;
}

@media (min-width:900px){
  .rail{display:block}
  .header__inner{min-height:72px;padding-block:12px}
}

@media (max-width:899px){
  .nav{
    position:fixed;top:0;right:0;bottom:0;z-index:70;
    width:min(86vw,360px);
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:88px 24px 32px;
    background:linear-gradient(180deg,rgba(18,48,79,.98),rgba(10,26,47,.99));
    border-left:1px solid var(--line-strong);
    overflow-y:auto;
    transform:translateX(103%);
    transition:transform .26s cubic-bezier(.4,.2,.2,1);
  }
  .nav[data-open]{transform:translateX(0)}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{
    padding:16px 0;font-size:17px;letter-spacing:.08em;
    border-bottom:1px solid var(--line);
  }
  .nav__link::after{bottom:8px}
  .nav__cta{margin:28px 0 0;width:100%}
  .nav-toggle{display:flex}
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,110px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,26,47,.96),rgba(18,48,79,.86));
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--signal),rgba(232,181,74,.6),transparent);
  opacity:.7;
}
.footer__grid{
  display:grid;gap:44px;
  grid-template-columns:minmax(0,1fr);
  padding-block:clamp(44px,6vw,72px) clamp(32px,4vw,48px);
}
.footer__brand{display:flex;flex-direction:column;gap:20px}
.footer__lede{font-size:15px;line-height:1.8;color:var(--ink-dim);max-width:42ch}
.footer__contact{display:flex;flex-direction:column;gap:8px;margin-top:4px}
.footer__contact-row{
  display:grid;grid-template-columns:82px minmax(0,1fr);gap:12px;
  padding-top:8px;border-top:1px solid rgba(154,167,178,.14);
}
.footer__contact-row dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--rock-deep);padding-top:3px}
.footer__contact-row dd{font-size:14px;color:var(--ink-soft);word-break:break-word}
.footer__nav{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(min(100%,140px),1fr))}
.footer__col{display:flex;flex-direction:column;gap:14px}
.footer__col-title{
  position:relative;padding-left:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:400;
  letter-spacing:.24em;text-transform:uppercase;color:var(--rock);
}
.footer__col-title::before{
  content:"";position:absolute;left:0;top:50%;width:6px;height:1px;background:var(--signal);transform:translateY(-50%);
}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__link{
  display:inline-block;font-size:14px;color:var(--ink-soft);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer__link:hover,.footer__link:focus-visible{color:var(--gold);border-bottom-color:rgba(232,181,74,.55)}
.footer__bottom{border-top:1px solid rgba(154,167,178,.16);background:rgba(8,20,36,.5)}
.footer__bottom-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding-block:18px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--rock-deep);
}
.footer__copy{color:var(--rock);font-size:11.5px}
.footer__legal{display:flex;flex-wrap:wrap;gap:16px;margin-left:auto}
.footer__legal a{color:var(--rock);transition:color var(--dur) var(--ease)}
.footer__legal a:hover,.footer__legal a:focus-visible{color:var(--mint)}
.footer__icp{color:var(--rock-deep)}

@media (min-width:900px){
  .footer__grid{grid-template-columns:minmax(280px,1.05fr) minmax(0,1.6fr);gap:clamp(40px,6vw,88px)}
}

/* ---------- 11. 微动效 ---------- */
html.is-reveal-ready [data-reveal]{opacity:0;transform:translateY(10px)}
html.is-reveal-ready [data-reveal].is-in{
  opacity:1;transform:none;
  transition:opacity .34s var(--ease),transform .34s var(--ease);
}
.scanline{position:relative;overflow:hidden}
.scanline::after{
  content:"";position:absolute;top:0;bottom:0;left:0;width:32%;
  background:linear-gradient(90deg,transparent,rgba(47,224,176,.13),transparent);
  animation:scan 8s linear infinite;
  pointer-events:none;
}
@keyframes scan{
  0%{transform:translateX(-120%);opacity:0}
  35%{opacity:.85}
  100%{transform:translateX(420%);opacity:0}
}

/* ---------- 12. 可访问性 ---------- */
:focus-visible{outline:2px solid var(--mint);outline-offset:3px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.is-reveal-ready [data-reveal]{opacity:1;transform:none}
  .scanline::after{display:none}
}