/* =============================
   STAKE观 · 全站共享样式
   深空蓝主底 · 荧光绿呼吸 · 奶油底封底
   ============================= */

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--space);
  background-image:
    radial-gradient(1100px 520px at 85% -80px, rgba(0,255,136,.06), transparent 60%),
    radial-gradient(900px 500px at -100px 30%, rgba(255,107,53,.04), transparent 60%);
  color:var(--gray);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{max-width:100%;height:auto;display:block;}
button{font:inherit;border:0;background:none;cursor:pointer;}
a{color:var(--neon);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--neon-end);}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0 0 8px;color:var(--cream);font-family:var(--font-heading);line-height:1.25;font-weight:900;}
h1{font-size:clamp(32px,6vw,48px);}
h2{font-size:clamp(26px,4vw,32px);}
h3{font-size:22px;font-weight:700;}
ul,ol{margin:0;padding:0;}
[hidden]{display:none!important;}
#main-content{outline:none;min-height:64vh;padding-bottom:32px;scroll-margin-top:110px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- Variables ---------- */
:root{
  --space:#0A192F;
  --space-light:#112240;
  --neon:#00FF88;
  --neon-end:#00D4AA;
  --cream:#F5F0E6;
  --ink:#1A1A1A;
  --orange:#FF6B35;
  --gray:#D1D5DB;
  --moon:#E2E8F0;
  --font-heading:"Noto Sans SC","Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Roboto","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --container:1280px;
  --radius:12px;
  --radius-sm:6px;
  --header-z:1000;
}

/* ---------- Skip Link & Scroll Progress ---------- */
.skip-link{
  position:fixed;top:-80px;left:16px;z-index:3000;
  background:var(--neon);color:var(--ink);
  font-family:var(--font-heading);font-weight:700;font-size:14px;
  padding:12px 20px;border-radius:0 0 8px 8px;
  box-shadow:0 8px 24px rgba(0,255,136,.3);
  transition:top .2s ease;
}
.skip-link:focus{top:0;outline:none;}
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--neon),var(--neon-end));
  z-index:2000;pointer-events:none;
}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:var(--header-z);}
.header-upper{
  background:var(--space-light);
  border-bottom:1px solid rgba(0,255,136,.14);
}
.header-upper-inner{
  max-width:var(--container);margin:0 auto;padding:6px 24px;
  display:flex;align-items:center;gap:16px;min-height:32px;
}
.status-indicator{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--neon);font-family:var(--font-heading);
  font-size:12px;font-weight:700;letter-spacing:.16em;
  white-space:nowrap;
}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--neon);
  animation:breathe 2.6s ease-in-out infinite;
}
.status-text{letter-spacing:.18em;}
.header-statement{
  margin:0;font-size:12px;color:rgba(226,232,240,.62);
  letter-spacing:.04em;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;
}
@keyframes breathe{
  0%,100%{box-shadow:0 0 0 0 rgba(0,255,136,.5);}
  50%{box-shadow:0 0 0 7px rgba(0,255,136,0);}
}
.header-main{
  background:rgba(10,25,47,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(226,232,240,.08);
  box-shadow:0 8px 24px rgba(0,0,0,.18);
}
.header-main-inner{
  max-width:var(--container);margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;gap:28px;position:relative;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--neon),var(--neon-end));
  color:var(--space);font-family:var(--font-heading);font-weight:900;font-size:18px;
  border-radius:4px 12px 4px 12px;
  box-shadow:0 0 16px rgba(0,255,136,.25);
}
.brand-name{
  font-family:var(--font-heading);font-weight:900;font-size:20px;
  letter-spacing:.06em;color:var(--cream);
}
.site-nav{display:flex;gap:2px;margin-right:auto;}
.site-nav a{
  display:inline-block;padding:9px 14px;border-radius:var(--radius-sm);
  color:var(--gray);font-family:var(--font-heading);font-size:14px;font-weight:700;
  text-decoration:none;position:relative;
  transition:color .2s ease,background .2s ease;
}
.site-nav a:hover{color:var(--neon);background:rgba(0,255,136,.06);}
.site-nav a[aria-current="page"]{color:var(--neon);}
.site-nav a[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;
  height:2px;border-radius:2px;background:var(--orange);
}
.version-hint{
  font-size:12px;color:rgba(226,232,240,.5);letter-spacing:.04em;
  white-space:nowrap;border-left:1px solid rgba(226,232,240,.12);padding-left:20px;
}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:10px;
  border-radius:var(--radius-sm);
  background:rgba(226,232,240,.04);border:1px solid rgba(226,232,240,.08);
  transition:border-color .2s ease,background .2s ease;
}
.nav-toggle:hover{background:rgba(0,255,136,.08);border-color:rgba(0,255,136,.3);}
.nav-toggle-bar{
  display:block;width:20px;height:2px;background:var(--cream);
  border-radius:1px;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- Footer ---------- */
.site-footer{margin-top:80px;}
.footer-main{background:var(--cream);color:var(--ink);padding:64px 0 56px;}
.footer-grid{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:48px;
}
.footer-brand-name{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-heading);font-size:22px;font-weight:900;
  color:var(--ink);margin:0 0 8px;
}
.footer-brand-mark{
  display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:4px 10px 4px 10px;
  background:linear-gradient(135deg,var(--space),var(--space-light));
  color:var(--neon);font-family:var(--font-heading);font-size:16px;font-weight:900;
}
.footer-tagline{
  margin:0 0 14px;font-size:12px;font-weight:700;
  letter-spacing:.2em;color:var(--orange);
}
.footer-trust{
  margin:0;max-width:360px;font-size:13px;line-height:1.8;color:rgba(26,26,26,.72);
}
.footer-nav{display:flex;flex-direction:column;}
.footer-nav-title{
  margin:4px 0 16px;font-family:var(--font-heading);font-size:12px;
  font-weight:900;letter-spacing:.18em;text-transform:uppercase;color:var(--space);
}
.footer-nav a{
  display:inline-block;padding:5px 0;color:var(--ink);
  font-size:14px;font-weight:700;text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.footer-nav a:hover{color:var(--orange);transform:translateX(3px);}
.footer-contact-item{
  margin:0;font-size:14px;line-height:1.9;color:rgba(26,26,26,.72);
}
.footer-contact-note{
  margin:14px 0 0;font-size:12px;line-height:1.7;color:rgba(26,26,26,.56);
}
.footer-bottom{background:#071529;border-top:1px solid rgba(0,255,136,.16);}
.footer-bottom-inner{
  max-width:var(--container);margin:0 auto;padding:18px 24px;
  display:flex;justify-content:space-between;align-items:center;
  gap:12px;flex-wrap:wrap;font-size:12px;color:rgba(209,213,219,.68);
}
.footer-copy,.footer-icp{margin:0;letter-spacing:.05em;}

/* ---------- Back to Top ---------- */
.back-to-top{
  position:fixed;right:24px;bottom:24px;z-index:900;
  width:46px;height:46px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid rgba(0,255,136,.4);
  background:rgba(10,25,47,.88);color:var(--neon);font-size:18px;line-height:1;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s ease,visibility .25s ease,transform .25s ease,
             box-shadow .25s ease,background .25s ease;
}
.back-to-top:hover{background:var(--space-light);box-shadow:0 0 24px rgba(0,255,136,.3);}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.back-to-top-icon{transform:translateY(-1px);}

/* ---------- Layout Primitives ---------- */
.container,.container-narrow{max-width:var(--container);margin:0 auto;padding:0 24px;}
.container-narrow{max-width:880px;}
.section{padding:72px 0;}
.section--tight{padding:48px 0;}
.section--sheared{
  padding:72px 0;margin:8px 0;
  background:linear-gradient(135deg,rgba(17,34,64,.9),rgba(10,25,47,.6));
  clip-path:polygon(0 2.5%,100% 0,100% 97.5%,0 100%);
}
.section-eyebrow{
  display:flex;align-items:center;gap:10px;
  color:var(--neon);font-size:12px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;margin:0 0 12px;
}
.section-eyebrow::before{content:"";width:26px;height:2px;background:var(--orange);}
.section-title{margin-bottom:12px;}
.section-lead{color:var(--gray);font-size:16px;max-width:640px;line-height:1.7;}

.grid{display:grid;gap:24px;}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}

.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:20px;}
.bento-item{grid-column:span 4;min-height:160px;}
.bento-item--half{grid-column:span 6;}
.bento-item--three{grid-column:span 8;}
.bento-item--full{grid-column:span 12;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:8px;
  font-family:var(--font-heading);font-size:14px;font-weight:700;line-height:1.2;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,
             color .2s ease,border-color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--neon),var(--neon-end));
  color:var(--space);box-shadow:0 6px 20px rgba(0,255,136,.22);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(0,255,136,.34);color:var(--space);}
.btn-ghost{border-color:rgba(226,232,240,.28);color:var(--moon);background:rgba(226,232,240,.03);}
.btn-ghost:hover{border-color:var(--neon);color:var(--neon);background:rgba(0,255,136,.05);}
.btn-dark{background:var(--ink);color:var(--cream);}
.btn-dark:hover{background:#000;color:var(--neon);}

/* ---------- Cards ---------- */
.card{
  border-radius:var(--radius);border:1px solid rgba(226,232,240,.07);
  background:linear-gradient(160deg,rgba(17,34,64,.55),rgba(10,25,47,.85));
  padding:28px;box-shadow:0 8px 24px rgba(0,0,0,.16);
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.card:hover{
  transform:translateY(-3px);border-color:rgba(0,255,136,.32);
  background:linear-gradient(160deg,rgba(17,34,64,.85),rgba(10,25,47,.95));
}
.card-title{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--cream);}
.card-body{font-size:14px;line-height:1.7;color:var(--gray);margin:0;}

/* ---------- Tags & Breadcrumb ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;
  border-radius:4px;font-size:12px;font-weight:700;
  letter-spacing:.06em;white-space:nowrap;
}
.tag--green{background:rgba(0,255,136,.1);color:var(--neon);border:1px solid rgba(0,255,136,.25);}
.tag--orange{background:rgba(255,107,53,.1);color:var(--orange);border:1px solid rgba(255,107,53,.3);}
.tag--cream{background:var(--cream);color:var(--ink);border:1px solid rgba(26,26,26,.08);}
.breadcrumb{
  display:flex;flex-wrap:wrap;gap:8px;padding:18px 0;
  font-size:12px;color:rgba(226,232,240,.5);list-style:none;margin:0;
}
.breadcrumb a{color:var(--gray);}
.breadcrumb a:hover{color:var(--neon);}
.breadcrumb li::after{content:"/";margin-left:8px;color:rgba(226,232,240,.22);}
.breadcrumb li:last-child::after{display:none;}
.breadcrumb [aria-current="page"]{color:var(--neon);font-weight:700;}

/* ---------- KPI & Table ---------- */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;}
.kpi{
  border:1px solid rgba(226,232,240,.07);border-radius:var(--radius);
  background:rgba(226,232,240,.03);padding:22px;
  transition:border-color .2s ease,background .2s ease;
}
.kpi:hover{border-color:rgba(0,255,136,.28);background:rgba(17,34,64,.8);}
.kpi-value{
  font-family:var(--font-heading);font-size:40px;font-weight:900;line-height:1.1;
  color:var(--neon);font-variant-numeric:tabular-nums;
}
.kpi-label{font-size:12px;letter-spacing:.1em;color:rgba(226,232,240,.65);margin-top:6px;text-transform:uppercase;}
.table-wrap{
  overflow-x:auto;border-radius:var(--radius);
  border:1px solid rgba(226,232,240,.08);background:rgba(17,34,64,.5);
}
.table{width:100%;border-collapse:collapse;font-size:14px;min-width:640px;}
.table caption{
  caption-side:top;text-align:left;padding:14px 16px;
  font-weight:700;color:var(--cream);font-family:var(--font-heading);
}
.table th{
  background:var(--space-light);color:var(--cream);font-weight:700;
  text-align:left;padding:12px 16px;
  border-bottom:1px solid rgba(0,255,136,.15);white-space:nowrap;
}
.table td{padding:12px 16px;border-bottom:1px solid rgba(226,232,240,.05);color:var(--gray);}
.table tbody tr:hover td{background:rgba(0,255,136,.04);}
.table tr:last-child td{border-bottom:0;}

/* ---------- Media Placeholder ---------- */
.media-box{
  position:relative;overflow:hidden;border-radius:var(--radius);
  border:1px solid rgba(226,232,240,.1);
  background:
    repeating-linear-gradient(0deg,transparent 0 23px,rgba(226,232,240,.05) 23px 24px),
    repeating-linear-gradient(90deg,transparent 0 23px,rgba(226,232,240,.05) 23px 24px),
    radial-gradient(120% 120% at 80% -20%,rgba(0,255,136,.14),transparent 50%),
    linear-gradient(160deg,var(--space-light),var(--space));
  box-shadow:inset 0 0 60px rgba(0,0,0,.18);
}
.media-box::before{
  content:"";position:absolute;top:0;bottom:0;left:-25%;width:45%;
  background:linear-gradient(105deg,transparent,rgba(0,255,136,.06),transparent);
  transform:skewX(-18deg);pointer-events:none;
}
.media-box--wide{aspect-ratio:16/9;}
.media-box--square{aspect-ratio:1/1;}
.media-box--tall{aspect-ratio:3/4;}
.media-box--banner{aspect-ratio:21/9;}
.media-caption{font-size:12px;color:rgba(226,232,240,.6);padding:8px 2px;margin:0;}

/* ---------- Page Hero ---------- */
.page-hero{padding:56px 0 24px;}
.page-hero-title{font-size:clamp(28px,4vw,40px);font-weight:900;color:var(--cream);margin:12px 0;}
.page-hero-lead{color:var(--gray);font-size:16px;max-width:680px;}

/* ---------- FAQ ---------- */
.faq{max-width:840px;}
.faq-item{border-bottom:1px solid rgba(226,232,240,.1);}
.faq-question{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:20px 0;background:none;border:0;
  color:var(--cream);font-family:var(--font-heading);font-size:16px;font-weight:700;
  text-align:left;cursor:pointer;transition:color .2s ease;
}
.faq-question:hover{color:var(--neon);}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--neon);
  border-radius:1px;transition:transform .25s ease,background .25s ease;
}
.faq-icon::before{left:1px;right:1px;top:9px;height:2px;}
.faq-icon::after{top:1px;bottom:1px;left:9px;width:2px;}
.faq-item[data-open] .faq-icon::after{transform:scaleY(0);}
.faq-item[data-open] .faq-icon::before{background:var(--orange);}
.faq-answer{display:none;padding:0 32px 24px 0;color:var(--moon);font-size:14px;line-height:1.8;}
.faq-item[data-open] .faq-answer{display:block;}

/* ---------- Reveal / Focus / Motion ---------- */
.has-reveal [data-reveal]{
  opacity:0;transform:translateY(22px);
  transition:opacity .5s ease,transform .5s ease;
}
.has-reveal [data-reveal].is-revealed{opacity:1;transform:none;}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:2px;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none;}
  .back-to-top{transition:none;}
}

/* ---------- Responsive ---------- */
@media (max-width:959px){
  .header-main-inner{gap:12px;}
  .site-nav{
    display:none;position:absolute;top:calc(100% + 1px);left:-24px;right:-24px;
    margin:0;flex-direction:column;gap:2px;padding:12px 24px 16px;
    background:rgba(17,34,64,.98);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-top:1px solid rgba(0,255,136,.18);
    border-bottom:1px solid rgba(0,255,136,.18);
    box-shadow:0 24px 48px rgba(0,0,0,.4);
  }
  .site-nav[data-open]{display:flex;}
  .site-nav a{border-bottom:1px solid rgba(226,232,240,.05);border-radius:0;padding:13px 8px;}
  .site-nav a:last-child{border-bottom:0;}
  .site-nav a::after{display:none;}
  .site-nav a[aria-current="page"]{background:rgba(0,255,136,.07);}
  .version-hint{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .bento-item{grid-column:span 6;}
  .bento-item--three,.bento-item--full{grid-column:span 12;}
  .grid--3{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .site-footer{margin-top:56px;}
}
@media (min-width:960px){
  .nav-toggle{display:none;}
}
@media (max-width:640px){
  .header-statement{display:none;}
  .header-main-inner{padding:10px 16px;}
  .header-upper-inner{padding:6px 16px;}
  .brand-name{font-size:17px;}
  .brand-mark{width:34px;height:34px;font-size:16px;}
  .container,.container-narrow{padding:0 16px;}
  .section{padding:52px 0;}
  .section--sheared{padding:52px 0;}
  .bento-item,.bento-item--half,.bento-item--three,.bento-item--full{grid-column:span 12;}
  .grid--2,.grid--3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:0 16px;}
  .footer-main{padding:48px 0 40px;}
  .footer-bottom-inner{padding:16px;flex-direction:column;align-items:flex-start;}
  .back-to-top{right:16px;bottom:16px;}
}