/* =========================================================
   TPG 电子平台 — 共享样式 /assets/site.css
   夜间控制室 × 街机厅：深墨蓝基底 + 电子青 / 霓虹紫高光
   ========================================================= */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,dl,dd,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- variables ---------- */
:root{
  --ink:#0B1B33;
  --panel:#12294A;
  --panel-deep:#0A1730;
  --violet-deep:#1B1236;
  --cyan:#22D3EE;
  --purple:#A855F7;
  --amber:#F5A524;
  --text:#C9D6E4;
  --bright:#F2F7FF;
  --scan:#1C6E7E;
  --ok:#34D399;
  --rail-w:104px;
  --maxw:1280px;
  --pad-x:clamp(16px,3.2vw,40px);
  --font-sans:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- base ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 620px at 10% -8%, rgba(34,211,238,.16), transparent 62%),
    radial-gradient(820px 700px at 102% 2%, rgba(168,85,247,.15), transparent 60%),
    radial-gradient(700px 520px at 60% 108%, rgba(27,18,54,.55), transparent 65%),
    linear-gradient(180deg,#0B1B33 0%,#0A1730 52%,#0B1B33 100%);
  background-attachment:fixed;
  min-height:100vh;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg, rgba(28,110,126,.10) 0 1px, transparent 1px 4px);
  opacity:.5;
}
h1,h2,h3,h4{color:var(--bright);font-weight:600;line-height:1.25;letter-spacing:.06em}
h1{font-size:clamp(28px,4.4vw,52px)}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:clamp(18px,1.8vw,22px)}
h4{font-size:17px;letter-spacing:.05em}
p{max-width:72ch}
strong{color:var(--bright)}
::selection{background:rgba(34,211,238,.32);color:var(--bright)}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}

.page-main{position:relative;z-index:2;display:block}

/* ---------- utilities ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(32px,4vw,56px)}
.mono,.num{font-family:var(--font-mono);letter-spacing:.02em;color:var(--bright)}
.muted{color:rgba(201,214,228,.72)}
.divider-scan{
  height:1px;border:0;margin:clamp(28px,4vw,60px) 0;
  background-image:repeating-linear-gradient(90deg, rgba(34,211,238,.5) 0 18px, transparent 18px 36px);
  opacity:.5;
}
.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--2,.grid--3{grid-template-columns:1fr}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:0 clamp(12px,1.6vw,24px)}
.offset-1{grid-column:1 / -1}

/* ---------- eyebrow / section head ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  color:var(--cyan);margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.sec-head{margin-bottom:clamp(24px,3vw,40px)}
.sec-head__title{margin-bottom:10px}
.sec-head__desc{font-size:16px;color:rgba(201,214,228,.8)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;border-radius:2px;
  border:1px solid rgba(34,211,238,.5);
  background:rgba(34,211,238,.08);
  color:var(--bright);font-size:15px;letter-spacing:.06em;
  text-decoration:none;cursor:pointer;
  transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.btn:hover,.btn:focus-visible{background:rgba(34,211,238,.18);border-color:var(--cyan);transform:translateY(-1px)}
.btn--primary{
  background:linear-gradient(90deg,rgba(34,211,238,.92),rgba(168,85,247,.86));
  border-color:transparent;color:#04182B;font-weight:600;
}
.btn--primary:hover,.btn--primary:focus-visible{background:linear-gradient(90deg,#22D3EE,#A855F7);color:#04182B}
.btn--ghost{background:transparent;border-color:rgba(168,85,247,.55)}
.btn--amber{background:rgba(245,165,36,.1);border-color:rgba(245,165,36,.58);color:var(--amber)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:2px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
  color:var(--cyan);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.35);
}
.tag--purple{color:#D9B8FF;border-color:rgba(168,85,247,.45);background:rgba(168,85,247,.14)}
.tag--amber{color:var(--amber);border-color:rgba(245,165,36,.45);background:rgba(245,165,36,.1)}

/* ---------- panel ---------- */
.panel{
  position:relative;overflow:hidden;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid rgba(34,211,238,.18);border-radius:4px;
  background:linear-gradient(160deg,rgba(18,41,74,.94),rgba(11,27,51,.92));
}
.panel::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg, rgba(28,110,126,.12) 0 1px, transparent 1px 5px);
  opacity:.55;
}
.panel--accent{border-color:rgba(168,85,247,.42);background:linear-gradient(160deg,rgba(27,18,54,.9),rgba(11,27,51,.92))}
.panel__title{margin-bottom:10px}

/* ---------- readout ---------- */
.readout{
  display:flex;flex-direction:column;gap:6px;
  padding:clamp(16px,2vw,22px);
  border:1px solid rgba(245,165,36,.32);border-radius:4px;
  background:radial-gradient(130% 120% at 18% 0%, rgba(245,165,36,.12), rgba(18,41,74,.6));
}
.readout__value{font-family:var(--font-mono);font-size:clamp(26px,3.4vw,40px);line-height:1;color:var(--amber);letter-spacing:.04em}
.readout__label{font-size:13px;color:rgba(201,214,228,.82)}

/* ---------- image frame ---------- */
.img-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:16 / 9;overflow:hidden;border-radius:4px;
  border:1px solid rgba(34,211,238,.2);
  background:linear-gradient(140deg,#12294A,#1B1236 58%,#0B1B33);
}
.img-frame > img{width:100%;height:100%;object-fit:cover}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg, rgba(28,110,126,.2) 0 1px, transparent 1px 6px);
}
.img-frame--wide{aspect-ratio:21 / 9}
.img-frame--square{aspect-ratio:1 / 1}
.img-frame--tall{aspect-ratio:4 / 5}
.img-frame__label{
  position:absolute;left:12px;bottom:12px;z-index:1;
  padding:4px 9px;border-left:2px solid var(--cyan);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--bright);background:rgba(11,27,51,.72);
}

/* ---------- breadcrumbs ---------- */
.crumbs{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:rgba(201,214,228,.72)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs__list li{display:flex;align-items:center;gap:8px}
.crumbs__list li:not(:last-child)::after{content:"/";color:var(--scan)}
.crumbs__link{text-decoration:none;color:var(--text)}
.crumbs__link:hover,.crumbs__link:focus-visible{color:var(--cyan)}

/* ---------- reveal ---------- */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js [data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:10px;top:-70px;z-index:100;
  padding:10px 18px;border-radius:0 0 4px 4px;
  background:var(--cyan);color:#04263A;font-weight:600;text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:60;
  background:rgba(28,110,126,.35);
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--purple) 70%,var(--amber));
}

/* ---------- header ---------- */
.site-header{
  position:relative;z-index:40;
  background:linear-gradient(180deg,#0D2140 0%,#0B1B33 100%);
  border-bottom:1px solid rgba(34,211,238,.2);
}

/* brand rail (mobile: top strip) */
.rail{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  padding:12px var(--pad-x);
  background:linear-gradient(90deg,rgba(18,41,74,.96),rgba(11,27,51,.6));
  border-bottom:1px solid rgba(28,110,126,.5);
}
.rail__brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{
  font-family:var(--font-mono);font-size:14px;letter-spacing:.14em;
  color:var(--cyan);border:1px solid rgba(34,211,238,.5);
  padding:3px 7px;border-radius:2px;white-space:nowrap;
}
.brand-name{font-size:15px;letter-spacing:.1em;color:var(--bright);white-space:nowrap}
.rail__state{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(201,214,228,.8);
}
.state-dot{
  width:8px;height:8px;border-radius:50%;flex:none;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(52,211,153,.16),0 0 10px rgba(52,211,153,.55);
  animation:dot-pulse 2.8s ease-in-out infinite;
}
@keyframes dot-pulse{0%,100%{opacity:1}50%{opacity:.45}}

/* fixed favorites bar */
.quickbar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 0 auto}
.quickbar__link{
  padding:6px 10px;border-radius:2px;text-decoration:none;white-space:nowrap;
  font-size:12px;letter-spacing:.06em;color:var(--bright);
  background:rgba(34,211,238,.07);border:1px solid rgba(34,211,238,.35);
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.quickbar__link:hover,.quickbar__link:focus-visible{
  background:rgba(168,85,247,.18);border-color:rgba(168,85,247,.6);color:var(--bright);
}

/* header top layer */
.header-top{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;
  padding:10px var(--pad-x);
  font-size:12.5px;letter-spacing:.03em;
  background:linear-gradient(90deg,rgba(27,18,54,.5),rgba(11,27,51,0) 72%);
  border-bottom:1px solid rgba(28,110,126,.45);
}
.header-top::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background-image:repeating-linear-gradient(90deg, rgba(34,211,238,.7) 0 14px, transparent 14px 26px);
  opacity:.32;
}
.header-top__lede{font-size:13px;color:var(--bright)}
.header-top__meta{display:flex;flex-wrap:wrap;gap:8px 26px;margin-left:auto;font-family:var(--font-mono);font-size:11.5px}
.header-top__meta-item{display:flex;align-items:baseline;gap:8px}
.header-top__meta dt{color:rgba(201,214,228,.7);letter-spacing:.08em}
.header-top__meta dd{color:var(--amber);letter-spacing:.04em}

/* header main layer */
.header-main{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:8px var(--pad-x) 10px;
  background:linear-gradient(180deg,rgba(18,41,74,.9),rgba(11,27,51,.78));
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:9px 14px;border-radius:2px;cursor:pointer;
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.45);
  color:var(--bright);font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(34,211,238,.16)}
.nav-toggle__bars{position:relative;display:inline-block;width:18px;height:10px;flex:none}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:var(--cyan);
  transition:transform .2s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}

.nav{display:none;flex-basis:100%}
.nav[data-open]{display:block}
.nav__list{display:flex;flex-direction:column;gap:2px;padding-bottom:8px}
.nav__link{
  position:relative;display:block;
  padding:10px 14px;border-radius:2px;
  font-size:15px;letter-spacing:.06em;text-decoration:none;color:var(--text);
  border:1px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav__link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:1px;
  background:var(--cyan);opacity:0;transform:scaleX(.4);transform-origin:0 50%;
  transition:opacity .25s ease,transform .25s ease;
}
.nav__link:hover,.nav__link:focus-visible{
  color:var(--bright);background:rgba(168,85,247,.13);border-color:rgba(168,85,247,.45);
}
.nav__link:hover::after,.nav__link:focus-visible::after{opacity:.9;transform:none}
.nav__link[aria-current="page"]{
  color:var(--bright);
  border-color:rgba(34,211,238,.55);
  background:linear-gradient(90deg,rgba(34,211,238,.2),rgba(168,85,247,.16));
}
.nav__link[aria-current="page"]::after{opacity:1;transform:none;background:var(--amber)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:2;
  margin-top:clamp(56px,8vw,110px);
  background:linear-gradient(180deg,#0A1730 0%,#0B1B33 45%,#081426 100%);
  border-top:1px solid rgba(34,211,238,.22);
}
.footer__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--pad-x) clamp(20px,3vw,30px);
}
.footer__grid{display:grid;grid-template-columns:1fr;gap:clamp(28px,3vw,40px) clamp(20px,2.6vw,36px)}
.footer__col--brand{display:flex;flex-direction:column;gap:14px}
.footer__brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.footer__lede{font-size:14.5px;color:var(--text);max-width:40ch}
.footer__contact{display:grid;gap:8px;font-size:13.5px}
.footer__contact-row{display:flex;flex-wrap:wrap;gap:4px 12px}
.footer__contact-row dt{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(201,214,228,.65);min-width:5.5em;
}
.footer__contact-row dd{color:var(--bright)}
.footer__value--mono{font-family:var(--font-mono);letter-spacing:.03em}
.footer__note{
  font-size:12.5px;line-height:1.7;color:rgba(201,214,228,.72);max-width:46ch;
  padding-left:12px;border-left:2px solid rgba(245,165,36,.5);
}
.footer__title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.2em;color:var(--cyan);margin-bottom:14px;
}
.footer__list{display:grid;gap:10px}
.footer__link{
  position:relative;display:inline-block;
  font-size:14.5px;color:var(--text);text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}
.footer__link::before{
  content:"";position:absolute;left:0;top:50%;width:0;height:1px;
  background:var(--purple);transition:width .2s ease;
}
.footer__link:hover,.footer__link:focus-visible{color:var(--bright);padding-left:14px}
.footer__link:hover::before,.footer__link:focus-visible::before{width:9px}
.footer__status{
  display:flex;align-items:center;gap:8px;margin-top:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--ok);
}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 20px;margin-top:clamp(28px,4vw,48px);padding-top:18px;
  border-top:1px solid rgba(28,110,126,.45);
  font-size:12.5px;color:rgba(201,214,228,.72);
}
.footer__icp{font-family:var(--font-mono);letter-spacing:.06em;color:rgba(201,214,228,.82)}
.footer__scan{
  height:6px;
  background-image:repeating-linear-gradient(90deg, rgba(34,211,238,.55) 0 2px, transparent 2px 22px);
  opacity:.35;
}

/* ---------- responsive: tablet ---------- */
@media (min-width:640px){
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:760px){
  .nav{display:block;flex-basis:auto;margin-left:auto;width:auto}
  .nav__list{flex-direction:row;flex-wrap:wrap;gap:4px;padding-bottom:0}
  .nav-toggle{display:none}
}
@media (max-width:520px){
  .rail__state-text{display:none}
  .quickbar__link{padding:6px 8px;font-size:11px}
}

/* ---------- responsive: desktop ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .scroll-progress{left:var(--rail-w)}

  .rail{
    position:fixed;top:0;bottom:0;left:0;width:var(--rail-w);z-index:50;
    flex-direction:column;flex-wrap:nowrap;align-items:center;gap:22px;
    padding:26px 8px 24px;
    border-bottom:0;border-right:1px solid rgba(34,211,238,.18);
    background:linear-gradient(180deg,#0D2140 0%,#0A1730 55%,#0B1B33 100%);
  }
  .rail::after{
    content:"";position:absolute;top:0;right:-1px;bottom:0;width:1px;
    background-image:repeating-linear-gradient(180deg, rgba(34,211,238,.6) 0 7px, transparent 7px 20px);
    opacity:.45;
  }
  .rail__brand{flex-direction:column;align-items:center;gap:14px}
  .rail .brand-name{writing-mode:vertical-rl;text-orientation:upright;font-size:14px;letter-spacing:.32em}
  .rail__state{flex-direction:column;gap:6px}

  .quickbar{
    flex-direction:column;gap:8px;width:100%;
    margin:auto 0 0;
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
  }
  .quickbar[data-visible]{opacity:1;visibility:visible;transform:none}
  .quickbar__link{padding:10px 4px;text-align:center;font-size:11px;letter-spacing:.06em}

  .grid--3{grid-template-columns:repeat(3,1fr)}
  .offset-1{grid-column:2 / span 11}
  .footer__grid{grid-template-columns:1.5fr .85fr .95fr .85fr}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .state-dot{animation:none}
}