/* ============ 01 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,picture{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
:where(button){background:none;border:0;padding:0;cursor:pointer}
::selection{background:rgba(45,226,230,.28);color:#04121a}
*{scrollbar-width:thin;scrollbar-color:#26394F transparent}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:#070B14}
::-webkit-scrollbar-thumb{background:#24374F;border:2px solid #070B14}

/* ============ 02 tokens ============ */
:root{
  --ink-900:#070B14;
  --ink-850:#0A1120;
  --ink-800:#080D18;
  --panel:#0E1626;
  --panel-hi:#121E33;
  --line:#1B2A40;
  --line-hi:#26394F;
  --violet:#6B6F8A;
  --cyan:#2DE2E6;
  --orange:#FF6B35;
  --green:#37D67A;
  --yellow:#FFC857;
  --text:#E8F1FF;
  --text-2:#A8B6C8;
  --rail-w:264px;
  --head-h:60px;
  --maxw:1180px;
  --font-head:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Barlow Condensed","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-data:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.68,.32,1);
  --glow-cyan:0 0 0 1px rgba(45,226,230,.35),0 0 20px rgba(45,226,230,.16);
  --glow-orange:0 0 0 1px rgba(255,107,53,.35),0 0 20px rgba(255,107,53,.16);
}

/* ============ 03 base ============ */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  color:var(--text);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(920px 540px at 92% -12%,rgba(45,226,230,.075),transparent 68%),
    radial-gradient(760px 500px at -10% 104%,rgba(255,107,53,.055),transparent 70%),
    linear-gradient(rgba(27,42,64,.32) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,42,64,.32) 1px,transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:700;letter-spacing:.02em;line-height:1.16;color:var(--text)}
h1{font-size:clamp(1.85rem,4.6vw,3rem);line-height:1.08;letter-spacing:.01em}
h2{font-size:clamp(1.35rem,2.6vw,1.95rem)}
h3{font-size:clamp(1.08rem,1.7vw,1.3rem)}
p{color:var(--text-2)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
#main-content{scroll-margin-top:calc(var(--head-h) + 16px)}

/* ============ 04 utilities ============ */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,3vw,2.5rem)}
.stack{display:flex;flex-direction:column;gap:1rem}
.mono{font-family:var(--font-data);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.prose{max-width:72ch}
.prose p+p{margin-top:1.05em}
.grid{display:grid;gap:clamp(.85rem,1.6vw,1.25rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(208px,1fr))}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:.75rem 1.25rem;padding-bottom:.9rem;border-bottom:1px solid var(--line);margin-bottom:clamp(1.1rem,2.4vw,1.8rem)}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-data);font-size:.68rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor}

/* ============ 05 buttons / tags / cards ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  min-height:44px;padding:.68rem 1.2rem;
  font-family:var(--font-head);font-size:.92rem;font-weight:700;letter-spacing:.06em;
  color:var(--text);background:var(--panel-hi);
  border:1px solid var(--line-hi);border-radius:0;
  cursor:pointer;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease);
}
.btn:hover{text-decoration:none;border-color:var(--cyan);box-shadow:var(--glow-cyan)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:#04121a}
.btn--primary:hover{background:#5CF0F3;border-color:#5CF0F3;box-shadow:0 0 24px rgba(45,226,230,.4)}
.btn--alert{background:var(--orange);border-color:var(--orange);color:#1A0700}
.btn--alert:hover{background:#FF8155;border-color:#FF8155;box-shadow:var(--glow-orange)}
.btn--ghost{background:transparent;color:var(--text-2)}
.btn--ghost:hover{color:var(--cyan)}
.tag{display:inline-flex;align-items:center;gap:.35rem;padding:.22rem .5rem;font-family:var(--font-data);font-size:.68rem;font-weight:500;line-height:1.5;letter-spacing:.06em;color:var(--cyan);background:rgba(45,226,230,.1);border:1px solid rgba(45,226,230,.28)}
.tag--alert{color:var(--orange);background:rgba(255,107,53,.1);border-color:rgba(255,107,53,.3)}
.tag--ok{color:var(--green);background:rgba(55,214,122,.1);border-color:rgba(55,214,122,.3)}
.tag--warn{color:var(--yellow);background:rgba(255,200,87,.1);border-color:rgba(255,200,87,.3)}
.tag--mute{color:var(--text-2);background:rgba(107,111,138,.14);border-color:rgba(107,111,138,.32)}
.card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:0;padding:1.05rem 1.15rem;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.card:hover{border-color:rgba(45,226,230,.4);box-shadow:0 0 0 1px rgba(45,226,230,.1),0 12px 30px rgba(0,0,0,.36)}
.chip{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.34rem .6rem;font-family:var(--font-data);font-size:.72rem;font-weight:500;line-height:1.4;letter-spacing:.04em;color:var(--text-2);background:rgba(27,42,64,.55);border:1px solid var(--line)}
.chip:hover,.chip:focus-visible{color:var(--cyan);border-color:rgba(45,226,230,.45);background:rgba(45,226,230,.08);text-decoration:none}
.status{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--font-data);font-size:.7rem;font-weight:500;line-height:1.4;letter-spacing:.1em;text-transform:uppercase;color:var(--text-2)}
.status__dot{width:7px;height:7px;flex:0 0 auto;border-radius:2px;background:var(--green);box-shadow:0 0 0 3px rgba(55,214,122,.16)}

/* ============ 06 breadcrumb / figure ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;font-family:var(--font-data);font-size:.72rem;line-height:1.6;letter-spacing:.06em;color:var(--violet)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--cyan);text-decoration:none}
.breadcrumb__sep{color:var(--line-hi)}
.figure{position:relative;margin:0;background:var(--panel);border:1px solid var(--line);overflow:hidden}
.figure__frame{
  position:relative;display:block;width:100%;aspect-ratio:16/10;overflow:hidden;
  background:
    radial-gradient(120% 120% at 0% 0%,rgba(45,226,230,.14),transparent 55%),
    radial-gradient(120% 120% at 100% 100%,rgba(255,107,53,.12),transparent 55%),
    repeating-linear-gradient(90deg,transparent 0 23px,rgba(27,42,64,.62) 23px 24px),
    repeating-linear-gradient(0deg,transparent 0 23px,rgba(27,42,64,.62) 23px 24px),
    var(--ink-850);
}
.figure__frame::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(45,226,230,.08)}
.figure__frame>img,.figure__frame>picture>img{width:100%;height:100%;object-fit:cover}
.figure__cap{display:block;padding:.6rem .85rem;border-top:1px solid var(--line);font-family:var(--font-data);font-size:.72rem;line-height:1.6;letter-spacing:.06em;text-transform:uppercase;color:var(--violet)}
.figure--wide .figure__frame{aspect-ratio:21/9}
.figure--tall .figure__frame{aspect-ratio:4/5}

/* ============ 07 skip link + progress ============ */
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:200;
  padding:.62rem 1rem;
  font-family:var(--font-data);font-size:.76rem;font-weight:600;letter-spacing:.08em;
  color:#04121A;background:var(--cyan);border:1px solid #04121A;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus-visible{transform:none;text-decoration:none}
.read-progress{position:fixed;top:0;left:0;width:100%;height:2px;z-index:120;pointer-events:none;background:rgba(27,42,64,.6)}
.read-progress__bar{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--cyan),var(--orange));transform:scaleX(0);transform-origin:0 50%;box-shadow:0 0 12px rgba(45,226,230,.55)}

/* ============ 08 header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink-800);
  color:var(--text);
  border-bottom:1px solid var(--line-hi);
}
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;min-height:var(--head-h);padding:.5rem .9rem}
.brand{display:inline-flex;align-items:center;gap:.65rem;min-width:0;color:inherit}
.brand:hover{text-decoration:none}
.brand__mark{
  position:relative;flex:0 0 auto;display:grid;place-items:center;
  width:36px;height:36px;
  font-family:var(--font-data);font-size:.86rem;font-weight:700;line-height:1;letter-spacing:-.03em;
  color:#04121A;background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
  filter:drop-shadow(0 0 8px rgba(45,226,230,.45));
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-family:var(--font-head);font-size:.98rem;font-weight:700;line-height:1.25;letter-spacing:.09em;color:var(--text);white-space:nowrap}
.brand__line{font-family:var(--font-data);font-size:.6rem;font-weight:400;line-height:1.45;letter-spacing:.18em;color:var(--violet);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-toggle{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:.5rem;
  min-height:40px;padding:.45rem .7rem;
  font-family:var(--font-data);font-size:.7rem;font-weight:600;letter-spacing:.12em;
  color:var(--text-2);background:rgba(27,42,64,.5);
  border:1px solid var(--line-hi);border-radius:0;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{color:var(--cyan);border-color:rgba(45,226,230,.5)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--cyan);transition:background .18s var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);transition:transform .18s var(--ease),top .18s var(--ease)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{line-height:1}
.site-nav{
  position:fixed;top:var(--head-h);left:0;right:0;z-index:75;
  max-height:calc(100dvh - var(--head-h));
  overflow-y:auto;
  padding:.75rem .9rem 1.2rem;
  background:linear-gradient(180deg,#0B1322,#080D18);
  border-bottom:1px solid var(--line-hi);
  box-shadow:0 26px 44px rgba(0,0,0,.55);
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.site-header[data-open] .site-nav{opacity:1;visibility:visible;transform:none}
.nav-title{font-family:var(--font-data);font-size:.62rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--violet);padding-left:.7rem;margin-bottom:.55rem}
.nav-list{display:flex;flex-direction:column;gap:1px}
.nav-link{
  display:flex;align-items:center;gap:.75rem;
  padding:.62rem .7rem;
  font-size:.92rem;font-weight:500;line-height:1.35;
  color:var(--text-2);
  border-left:2px solid transparent;
  transition:color .16s var(--ease),background .16s var(--ease),border-color .16s var(--ease);
}
.nav-link__num{font-family:var(--font-data);font-size:.68rem;font-weight:400;line-height:1;letter-spacing:.06em;color:var(--violet);transition:color .16s var(--ease)}
.nav-link__text{min-width:0}
.nav-link:hover{color:var(--text);background:rgba(45,226,230,.06);text-decoration:none}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:linear-gradient(90deg,rgba(45,226,230,.14),rgba(45,226,230,0));
}
.nav-link[aria-current="page"] .nav-link__num{color:var(--cyan)}
.nav-tools{margin-top:1rem;padding-top:.9rem;border-top:1px solid var(--line)}
.nav-tools__title{font-family:var(--font-data);font-size:.62rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--violet);margin-bottom:.55rem;padding-left:.2rem}
.nav-tools__list{display:grid;grid-template-columns:1fr 1fr;gap:.4rem}
.rail-foot{display:none}
.rail-foot__meta{font-family:var(--font-data);font-size:.66rem;line-height:1.5;letter-spacing:.1em;color:var(--violet)}

/* ============ 09 footer ============ */
.site-footer{
  position:relative;
  margin-top:clamp(2.5rem,7vw,5rem);
  background:linear-gradient(180deg,#080E1B 0%,#050810 100%);
  border-top:1px solid var(--line-hi);
  color:var(--text-2);
}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(45,226,230,.55),rgba(255,107,53,.45),transparent)}
.footer-inner{width:100%;max-width:var(--maxw);margin-inline:auto;padding:clamp(1.8rem,5vw,3.4rem) clamp(1rem,3vw,2.5rem) 1.4rem}
.footer-top{display:grid;grid-template-columns:1fr;gap:clamp(1.5rem,3.4vw,2.4rem)}
.footer-brand__mark{display:inline-grid;place-items:center;padding:.3rem .55rem;font-family:var(--font-data);font-size:.96rem;font-weight:700;line-height:1;letter-spacing:-.02em;color:#04121A;background:var(--cyan);clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%)}
.footer-brand__name{margin-top:.7rem;font-family:var(--font-head);font-size:1.05rem;font-weight:700;line-height:1.3;letter-spacing:.12em;color:var(--text)}
.footer-brand__sum{margin-top:.55rem;font-size:.86rem;line-height:1.75;color:var(--text-2);max-width:36ch}
.footer-sync{display:flex;align-items:center;gap:.5rem;margin-top:.9rem;font-family:var(--font-data);font-size:.68rem;font-weight:500;line-height:1.5;letter-spacing:.08em;color:var(--violet)}
.footer-col__title{position:relative;margin-bottom:.9rem;padding-bottom:.55rem;font-family:var(--font-data);font-size:.68rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--text)}
.footer-col__title::after{content:"";position:absolute;left:0;bottom:0;width:22px;height:2px;background:var(--orange)}
.footer-list{display:flex;flex-direction:column;gap:.45rem}
.footer-link{display:inline-flex;align-items:center;gap:.5rem;font-size:.88rem;line-height:1.6;color:var(--text-2);transition:color .16s var(--ease)}
.footer-link::before{content:"";width:0;height:1px;background:var(--cyan);transition:width .18s var(--ease)}
.footer-link:hover{color:var(--cyan);text-decoration:none}
.footer-link:hover::before{width:10px}
.footer-contact{display:grid;grid-template-columns:1fr;gap:.9rem;margin-top:clamp(1.6rem,3.4vw,2.4rem);padding-top:clamp(1.2rem,2.6vw,1.8rem);border-top:1px solid var(--line)}
.footer-contact__item{display:flex;flex-direction:column;gap:.2rem;min-width:0}
.footer-contact__label{font-family:var(--font-data);font-size:.64rem;font-weight:600;line-height:1.5;letter-spacing:.16em;text-transform:uppercase;color:var(--violet)}
.footer-contact__value{font-size:.86rem;line-height:1.65;color:var(--text);overflow-wrap:anywhere}
.footer-contact__value--mono{font-family:var(--font-data);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.footer-base{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1.5rem;margin-top:clamp(1.4rem,3vw,2rem);padding-top:1rem;border-top:1px solid var(--line)}
.footer-base p{font-family:var(--font-data);font-size:.72rem;line-height:1.7;letter-spacing:.06em;color:var(--violet)}
.footer-base__meta{color:var(--line-hi)}

/* ============ 10 reveal ============ */
.js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
.js [data-reveal="in"]{opacity:1;transform:none}

/* ============ 11 tablet ============ */
@media (min-width:700px){
  .footer-top{grid-template-columns:repeat(2,1fr)}
  .footer-contact{grid-template-columns:repeat(3,1fr)}
}

/* ============ 12 desktop rail ============ */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-header{
    position:fixed;top:0;left:0;bottom:0;right:auto;
    width:var(--rail-w);
    display:grid;
    grid-template-rows:auto minmax(0,1fr) auto;
    border-bottom:0;border-right:1px solid var(--line-hi);
    background:linear-gradient(180deg,#0B1322 0%,#070B14 62%);
  }
  .rail-head{min-height:0;padding:1.1rem 1.05rem;justify-content:flex-start;border-bottom:1px solid var(--line)}
  .nav-toggle{display:none}
  .site-nav{
    position:static;max-height:none;overflow-y:auto;
    opacity:1;visibility:visible;transform:none;
    box-shadow:none;border-bottom:0;background:transparent;
    padding:1rem .55rem;
  }
  .nav-title{padding-left:.7rem}
  .rail-foot{display:flex;flex-direction:column;gap:.35rem;padding:.85rem 1.05rem;border-top:1px solid var(--line)}
  .footer-top{grid-template-columns:1.7fr repeat(3,1fr)}
  .footer-base__meta{color:var(--violet)}
}

/* ============ 13 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}
  .js [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
}