/* =========================================================
   欧宝主站 · 共享样式 /assets/site.css
   深空黑底盘 + 闪电黄交互 + 电光青数据高亮
   ========================================================= */

/* ---------- 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;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--bolt);outline-offset:3px;border-radius:4px}

/* ---------- tokens ---------- */
:root{
  --ink-900:#0A0D12;
  --ink-800:#141A23;
  --ink-700:#1B2330;
  --ink-600:#232C3B;
  --paper:#F4F0E6;
  --bolt:#FFD400;
  --amber:#FFB300;
  --cyan:#00E5FF;
  --lime:#39FF88;
  --red:#FF4D4D;
  --muted:#8A94A6;
  --glass:rgba(255,255,255,.08);
  --glass-strong:rgba(255,255,255,.14);
  --line:rgba(244,240,230,.12);
  --line-strong:rgba(244,240,230,.26);
  --font-sans:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",ui-monospace,monospace;
  --shell:1280px;
  --gutter:clamp(1.1rem,4vw,3rem);
  --r-s:6px;
  --r-m:14px;
  --r-l:22px;
  --shadow-lift:0 24px 52px -32px rgba(0,0,0,.96);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- base ---------- */
body{
  position:relative;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.72;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58% 42% at 84% -6%, rgba(255,212,0,.11), transparent 62%),
    radial-gradient(46% 40% at 2% 8%, rgba(0,229,255,.09), transparent 60%),
    radial-gradient(40% 34% at 50% 108%, rgba(57,255,136,.06), transparent 64%);
}
main,.site-header,.site-footer,.quick-dock{position:relative;z-index:1}
h1,h2,h3,h4{font-weight:800;line-height:1.14;letter-spacing:-.015em}
p{max-width:70ch}
strong{font-weight:800;color:var(--paper)}
small{font-size:.82rem}
::selection{background:var(--bolt);color:var(--ink-900)}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:880px}
.section{position:relative;padding-block:clamp(2.6rem,6vw,5rem)}
.section__head{max-width:780px}
.section__eyebrow{
  display:flex;align-items:center;gap:.6rem;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);
}
.section__title{
  margin-top:.65rem;
  font-size:clamp(1.8rem,4vw,3.2rem);
  font-weight:900;line-height:1.06;letter-spacing:-.025em;
}
.section__lead{margin-top:.95rem;color:var(--muted);font-size:1.02rem;max-width:62ch}
.display-title{
  font-size:clamp(2.8rem,7vw,6.5rem);
  font-weight:900;line-height:.98;letter-spacing:-.035em;
}
.index-num{
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.22em;
  color:var(--bolt);text-transform:uppercase;
}

/* ---------- grids ---------- */
.grid{display:grid;gap:clamp(1rem,2.4vw,1.6rem)}
.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))}

/* ---------- rules ---------- */
.rule{height:1px;border:0;background:var(--line)}
.rule--bolt{height:2px;border:0;background:linear-gradient(90deg,var(--bolt),rgba(255,212,0,0) 72%)}
.divider{height:1px;background:var(--line);margin-block:clamp(1.6rem,4vw,2.8rem)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.5rem;border-radius:999px;border:1px solid transparent;
  font-weight:800;font-size:.92rem;letter-spacing:.02em;line-height:1.2;
  transition:transform .22s var(--ease),background .22s,border-color .22s,color .22s,box-shadow .22s;
}
.btn--primary{background:var(--bolt);color:var(--ink-900);box-shadow:0 14px 30px -18px rgba(255,212,0,.95)}
.btn--primary:hover{background:var(--amber);transform:translateY(-2px)}
.btn--ghost{background:var(--glass);border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--cyan{background:var(--cyan);color:var(--ink-900)}
.btn--cyan:hover{background:var(--lime);transform:translateY(-2px)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.3rem .6rem;border-radius:4px;
  border:1px solid var(--line-strong);color:var(--muted);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
}
.tag--live{color:var(--lime);border-color:rgba(57,255,136,.42);background:rgba(57,255,136,.09)}
.tag--data{color:var(--cyan);border-color:rgba(0,229,255,.42);background:rgba(0,229,255,.09)}
.tag--bolt{color:var(--bolt);border-color:rgba(255,212,0,.42);background:rgba(255,212,0,.1)}

/* ---------- cards ---------- */
.card{
  position:relative;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:clamp(1.1rem,2.2vw,1.6rem);
  transition:transform .28s var(--ease),border-color .28s,box-shadow .28s,background .28s;
}
.card:hover{transform:translateY(-4px);border-color:rgba(0,229,255,.5);box-shadow:var(--shadow-lift)}
.card--glass{background:var(--glass);backdrop-filter:blur(14px);border-color:var(--line-strong)}
.card--float{background:var(--glass-strong);backdrop-filter:blur(18px);border-color:rgba(255,255,255,.24)}
.card--paper{
  --muted:#5B554C;
  --line:rgba(10,13,18,.14);
  --line-strong:rgba(10,13,18,.26);
  background:var(--paper);color:#141A23;border-color:transparent;
}
.card--paper:hover{border-color:rgba(10,13,18,.24)}
.card--paper .tag{color:var(--muted)}
.card__title{font-size:1.12rem;font-weight:800;margin-top:.5rem}
.card__text{color:var(--muted);font-size:.95rem;margin-top:.5rem}

/* ---------- stats ---------- */
.stat{display:flex;flex-direction:column;gap:.25rem}
.stat__value{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(1.6rem,3.4vw,2.6rem);line-height:1;
  color:var(--bolt);font-variant-numeric:tabular-nums;
}
.stat__value--cyan{color:var(--cyan)}
.stat__value--lime{color:var(--lime)}
.stat__label{font-size:.75rem;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}

/* ---------- media ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--r-m);border:1px solid var(--line);
  background:
    linear-gradient(150deg,var(--ink-700) 0%,var(--ink-900) 78%);
}
.media-frame img,.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--strip{aspect-ratio:21/9}
.media-frame--veil::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(178deg,transparent 44%,rgba(10,13,18,.82));
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:.85rem 1rem;font-size:.78rem;color:var(--paper);
  font-family:var(--font-mono);letter-spacing:.06em;
}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-size:.78rem;color:var(--muted);letter-spacing:.04em}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem}
.breadcrumb__link{color:var(--muted);text-decoration:underline;text-decoration-color:rgba(244,240,230,.25);text-underline-offset:3px}
.breadcrumb__link:hover{color:var(--bolt)}
.breadcrumb__sep{color:var(--line-strong);font-family:var(--font-mono)}

/* =========================================================
   头部
   ========================================================= */
.skip-link{
  position:fixed;top:.6rem;left:.6rem;z-index:200;
  padding:.6rem 1rem;border-radius:999px;
  background:var(--bolt);color:var(--ink-900);
  font-weight:800;font-size:.85rem;
  transform:translateY(-160%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,13,18,.86);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-stuck{box-shadow:0 18px 40px -30px rgba(0,0,0,.98);background:rgba(10,13,18,.94)}

.header-rail{border-bottom:1px solid var(--line)}
.header-rail__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:.42rem var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
}
.header-rail__brand{
  display:flex;align-items:center;gap:.5rem;
  font-size:.72rem;letter-spacing:.08em;color:var(--muted);
}
.brand-mark{
  flex:none;width:11px;height:11px;background:var(--bolt);
  clip-path:polygon(46% 0,100% 0,56% 41%,100% 41%,20% 100%,46% 56%,0 56%);
}
.header-rail__meta{
  display:flex;align-items:center;gap:.55rem;
  font-size:.7rem;letter-spacing:.08em;color:var(--muted);
  font-family:var(--font-mono);
}
.header-rail__sep{color:var(--line-strong)}
.header-rail__dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong)}

.live-pulse{
  flex:none;width:7px;height:7px;border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 0 rgba(57,255,136,.62);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(57,255,136,.6)}
  70%{box-shadow:0 0 0 9px rgba(57,255,136,0)}
  100%{box-shadow:0 0 0 0 rgba(57,255,136,0)}
}

.header-bar{position:relative}
.header-bar__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:.68rem var(--gutter);
  display:flex;align-items:center;gap:1.4rem;min-height:66px;
}
.brand-lockup{display:flex;align-items:center;gap:.7rem;flex:none}
.brand-lockup__glyph{
  position:relative;flex:none;width:38px;height:38px;
  border-radius:10px;background:var(--bolt);overflow:hidden;
}
.brand-lockup__glyph::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,transparent 41%,var(--ink-900) 41% 59%,transparent 59%);
}
.brand-lockup__text{display:flex;flex-direction:column;line-height:1.16}
.brand-lockup__name{font-size:1.02rem;font-weight:900;letter-spacing:.01em}
.brand-lockup__sub{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.2em;color:var(--cyan);
}
.brand-lockup--footer .brand-lockup__glyph{width:34px;height:34px;border-radius:9px}

.site-nav{flex:1;display:flex;align-items:center;justify-content:flex-end;gap:1.1rem}
.site-nav__list{display:flex;align-items:center;gap:.12rem}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:.55rem .78rem;border-radius:8px;
  font-size:.92rem;font-weight:600;color:var(--muted);
  transition:color .22s var(--ease),background .22s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:.78rem;right:.78rem;bottom:.3rem;height:2px;
  background:var(--bolt);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--paper);background:var(--glass)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--bolt)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.62rem 1.1rem;border-radius:999px;
  background:var(--bolt);color:var(--ink-900);
  font-weight:800;font-size:.85rem;letter-spacing:.02em;white-space:nowrap;
  box-shadow:0 12px 26px -18px rgba(255,212,0,.95);
  transition:transform .22s var(--ease),background .22s;
}
.nav-cta:hover{background:var(--amber);transform:translateY(-1px)}

.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  padding:.5rem .85rem;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--paper);
  font-size:.8rem;font-weight:700;letter-spacing:.08em;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;height:2px;border-radius:2px;background:var(--bolt);
  transition:transform .24s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--bolt);color:var(--bolt)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  pointer-events:none;overflow:hidden;
}
.scroll-progress__bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--bolt),var(--cyan) 62%,var(--lime));
}

/* ---------- 移动快捷坞 ---------- */
.quick-dock{display:none}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;margin-top:clamp(3rem,8vw,6rem);
  background:var(--ink-800);
  border-top:1px solid var(--line-strong);
}
.footer-scan{
  position:absolute;top:-1px;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--bolt),var(--cyan) 48%,rgba(57,255,136,0) 92%);
}
.footer-inner{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(2.4rem,5vw,4rem) var(--gutter) 1.6rem;
}
.footer-grid{
  display:grid;gap:clamp(1.6rem,3vw,2.6rem);
  grid-template-columns:1.5fr 1fr 1.35fr 1fr;
}
.footer-brand__line{
  margin-top:1rem;color:var(--muted);font-size:.92rem;max-width:42ch;
}
.footer-status{
  display:flex;align-items:center;gap:.5rem;margin-top:1rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;color:var(--lime);
}
.footer-col__title{
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
  padding-bottom:.65rem;margin-bottom:.85rem;border-bottom:1px solid var(--line);
}
.footer-list{display:grid;gap:.5rem}
.footer-link{
  display:inline-block;font-size:.92rem;color:var(--muted);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--bolt);transform:translateX(3px)}
.contact-row{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.45rem;
  font-size:.88rem;
}
.contact-row--stack{display:grid;gap:.15rem;margin-top:.4rem}
.contact-row__key{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;min-width:4.6rem;
}
.contact-row__val{color:var(--paper);word-break:break-all}
.copy-btn{
  padding:.18rem .5rem;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--muted);
  font-size:.68rem;font-weight:700;letter-spacing:.08em;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.copy-btn:hover{color:var(--ink-900);background:var(--bolt);border-color:var(--bolt)}
.copy-btn.is-copied{color:var(--ink-900);background:var(--lime);border-color:var(--lime)}
.footer-note{margin-top:.9rem;font-size:.78rem;color:var(--muted);max-width:34ch;line-height:1.6}
.footer-icp{
  margin-top:1rem;font-family:var(--font-mono);font-size:.76rem;
  letter-spacing:.06em;color:var(--muted);
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.7rem;
  margin-top:clamp(1.8rem,4vw,2.6rem);padding-top:1.2rem;border-top:1px solid var(--line);
  font-size:.78rem;color:var(--muted);
}
.footer-copy,.footer-meta{max-width:none}
.footer-sep{color:var(--line-strong)}

.to-top{
  position:fixed;right:clamp(1rem,3vw,2rem);bottom:clamp(1rem,3vw,2rem);z-index:70;
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.7rem 1.05rem;border-radius:999px;
  background:rgba(20,26,35,.92);backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);color:var(--paper);
  font-size:.76rem;font-weight:700;letter-spacing:.08em;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s,color .2s,border-color .2s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--bolt);color:var(--bolt)}
.to-top__glyph{font-family:var(--font-mono);color:var(--bolt)}

/* =========================================================
   动效：显现
   ========================================================= */
html[data-motion="on"] [data-reveal]{
  opacity:0;transform:translateY(20px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html[data-motion="on"] [data-reveal].is-visible{opacity:1;transform:none}
html[data-motion="on"] [data-reveal][data-reveal-delay="1"]{transition-delay:.08s}
html[data-motion="on"] [data-reveal][data-reveal-delay="2"]{transition-delay:.16s}
html[data-motion="on"] [data-reveal][data-reveal-delay="3"]{transition-delay:.24s}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1100px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1.2fr}
  .footer-col:last-child{grid-column:1 / -1}
  .footer-list{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-bar__inner{justify-content:space-between;gap:.8rem}

  .site-nav{
    position:absolute;left:var(--gutter);right:var(--gutter);top:calc(100% + 8px);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:.7rem;
    padding:1rem;max-height:calc(100dvh - 180px);overflow-y:auto;
    background:rgba(20,26,35,.97);
    backdrop-filter:blur(20px);
    border:1px solid var(--line-strong);border-radius:var(--r-m);
    box-shadow:var(--shadow-lift);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{
    padding:.85rem .9rem;font-size:1rem;
    border-bottom:1px solid var(--line);border-radius:0;
  }
  .site-nav__link::after{left:.9rem;right:auto;width:22px;bottom:.45rem}
  .nav-cta{width:100%;padding:.85rem 1rem;font-size:.92rem}

  .quick-dock{
    position:fixed;left:0;right:0;bottom:0;z-index:85;
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
    background:rgba(10,13,18,.95);
    backdrop-filter:blur(18px);
    border-top:1px solid var(--line-strong);
    padding:.35rem .4rem calc(.35rem + env(safe-area-inset-bottom,0px));
  }
  .quick-dock__item{
    display:flex;flex-direction:column;align-items:center;gap:.12rem;
    padding:.5rem .2rem;border-radius:10px;
    font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--muted);
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .quick-dock__item:hover,.quick-dock__item:focus-visible{color:var(--paper);background:var(--glass)}
  .quick-dock__item[aria-current="page"]{color:var(--bolt);background:rgba(255,212,0,.1)}
  .quick-dock__key{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;opacity:.7}

  body{padding-bottom:4.6rem}
  .to-top{bottom:calc(4.9rem + env(safe-area-inset-bottom,0px));right:1rem}

  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col:last-child{grid-column:auto}
  .footer-list{grid-template-columns:minmax(0,1fr)}
  .footer-note{max-width:none}
}

@media (max-width:720px){
  .header-rail__meta span:not(.live-pulse):not(.header-rail__sep){font-size:.66rem}
  .header-rail__brand{font-size:.66rem}
}

@media (max-width:600px){
  body{line-height:1.68}
  .header-rail__meta .header-rail__sep,.header-rail__meta span:nth-child(4){display:none}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .to-top__label{display:none}
  .to-top{padding:.8rem;border-radius:50%}
}

/* =========================================================
   无障碍与降级
   ========================================================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html[data-motion="on"] [data-reveal]{opacity:1;transform:none}
  .live-pulse{animation:none;box-shadow:none}
  .card:hover,.footer-link:hover,.btn:hover{transform:none}
}