/* ==========================================================================
   华体会HTH · 共享外壳样式表  /assets/site.css
   深空蓝近单色体系 + 活力橙强调 + 编辑部式数据长卷
   ========================================================================== */

:root{
  --ink-900:#050B1A;
  --ink-700:#0B1730;
  --ink-500:#14284D;
  --steel-300:#4A6FA5;
  --mist-100:#D7E1F0;
  --orange-500:#FF6A1A;
  --orange-300:#FFA15C;
  --neon-400:#3CE39B;
  --data-400:#8A94A6;
  --white:#FFFFFF;

  --shadow-hard:8px 12px 0 rgba(0,0,0,.45);
  --shadow-hard-sm:4px 6px 0 rgba(0,0,0,.45);
  --line:1px solid var(--steel-300);
  --line-soft:1px solid rgba(74,111,165,.42);

  --shell-max:1240px;
  --header-h:88px;
  --header-h-scrolled:64px;

  --font-display:"Oswald","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  color-scheme:dark;
}

/* ---------------------------------------------------------- reset ------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h-scrolled) + 20px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
table{border-collapse:collapse;width:100%}
::selection{background:var(--orange-500);color:var(--ink-900)}
:focus-visible{outline:3px solid var(--orange-500);outline-offset:3px}

/* ---------------------------------------------------------- base -------- */
body{
  background:var(--ink-900);
  color:var(--mist-100);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:1024px){body{font-size:18px}}

.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;
}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  transform:translateY(-260%);
  background:var(--orange-500);color:var(--ink-900);
  font-family:var(--font-display);font-weight:700;font-size:.95rem;
  padding:10px 18px;border:2px solid var(--ink-900);
  text-decoration:none;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------------------------------------------------------- layout ------ */
.shell{
  width:min(100% - 32px,var(--shell-max));
  margin-inline:auto;
}
@media (min-width:768px){.shell{width:min(100% - 56px,var(--shell-max))}}

.main-offset{padding-block-start:calc(var(--header-h) + clamp(24px,4vw,56px))}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,3fr)}
.grid--split > .grid__side{
  border-left:var(--line);
  padding-left:clamp(16px,2vw,28px);
}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

@media (max-width:960px){
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .grid--split > .grid__side{
    border-left:0;border-top:var(--line);
    padding-left:0;padding-top:20px;
  }
  .grid--halves{grid-template-columns:minmax(0,1fr)}
}

/* ---------------------------------------------------------- type -------- */
.display-1,.display-2,.display-3{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.06;
  color:var(--white);
}
.display-1{font-size:clamp(1.9rem,6vw,4.75rem)}
.display-2{font-size:clamp(1.6rem,4.2vw,3.25rem)}
.display-3{font-size:clamp(1.3rem,2.6vw,2rem)}

.mono,.kicker,.chapter__num,.stat__value,.stat__label,.tag,.footer__label,.footer__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}
.kicker{
  display:inline-block;
  font-size:.72rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--orange-500);
}
.lede{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(1.02rem,1.5vw,1.28rem);
  line-height:1.72;
  color:var(--mist-100);
}
.muted{color:var(--data-400)}

.prose{max-width:68ch;line-height:1.75}
.prose > * + *{margin-top:1em}
.prose h2,.prose h3{
  font-family:var(--font-display);font-weight:900;letter-spacing:-.015em;
  color:var(--white);line-height:1.2;margin-top:1.9em;
}
.prose h2{font-size:clamp(1.25rem,2.4vw,1.7rem)}
.prose h3{font-size:clamp(1.08rem,1.8vw,1.3rem)}
.prose ul,.prose ol{padding-left:1.35em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose li::marker{color:var(--orange-500)}
.prose a{color:var(--orange-300)}
.prose strong{color:var(--white);font-weight:700}

.rule{border:0;height:2px;background:var(--ink-500);margin-block:clamp(28px,4vw,48px)}

/* ---------------------------------------------------------- buttons ----- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-display);font-weight:700;font-size:1rem;letter-spacing:.01em;
  padding:.75rem 1.4rem;
  background:transparent;color:var(--mist-100);
  border:2px solid transparent;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn--primary{
  background:var(--orange-500);color:var(--ink-900);border-color:var(--orange-500);
  box-shadow:var(--shadow-hard-sm);
}
.btn--primary:hover{
  background:var(--orange-300);border-color:var(--orange-300);
  transform:translate(-4px,-4px);box-shadow:var(--shadow-hard);
}
.btn--primary:active{transform:translate(0,0);box-shadow:none}
.btn--ghost{border-color:var(--steel-300);color:var(--mist-100)}
.btn--ghost:hover{border-color:var(--orange-500);color:var(--orange-500);transform:translate(-4px,-4px);box-shadow:var(--shadow-hard-sm)}
.btn--ghost:active{transform:translate(0,0);box-shadow:none}
.btn--sm{padding:.5rem 1rem;font-size:.85rem}
.btn--block{width:100%}

/* ---------------------------------------------------------- header ------ */
.site-header{
  position:fixed;inset-block-start:0;inset-inline:0;z-index:70;
  background:transparent;
  border-bottom:2px solid transparent;
  transition:background-color .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header.is-scrolled{
  background:var(--ink-700);
  border-bottom:2px solid var(--ink-500);
  box-shadow:0 10px 0 rgba(0,0,0,.35);
}
.site-header__inner{
  position:relative;
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  height:var(--header-h);
  transition:height .28s ease;
}
.site-header.is-scrolled .site-header__inner{height:var(--header-h-scrolled)}

.brand{display:flex;flex-direction:column;gap:1px;text-decoration:none;flex:0 0 auto}
.brand__mark{
  font-family:var(--font-display);font-weight:900;font-size:1.25rem;
  letter-spacing:-.02em;line-height:1.1;color:var(--white);
}
.brand__accent{color:var(--orange-500);margin-left:.18em}
.brand__sub{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.2em;
  color:var(--data-400);text-transform:uppercase;white-space:nowrap;
}

.nav{display:flex;align-items:center;margin-inline:auto;min-width:0}
.nav__list{display:flex;align-items:center;gap:clamp(10px,1.8vw,26px)}
.nav__item{list-style:none}
.nav__link{
  position:relative;display:inline-block;
  padding:8px 2px;
  font-size:.95rem;font-weight:500;
  color:var(--mist-100);opacity:.82;text-decoration:none;
  transition:color .18s ease,opacity .18s ease;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--orange-500);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s ease;
}
.nav__link:hover{color:var(--orange-500);opacity:1}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--orange-500);opacity:1;font-weight:700}
.nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav__cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  background:transparent;border:2px solid var(--steel-300);
  color:var(--mist-100);
  padding:8px 12px;cursor:pointer;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--orange-500);color:var(--orange-500)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:20px;height:16px}
.nav-toggle__bar{display:block;height:2px;width:100%;background:currentColor;transition:transform .24s ease,opacity .24s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-2px;height:3px;
  background:rgba(74,111,165,.25);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--orange-500),var(--neon-400));
  transform:scaleX(0);transform-origin:left center;
}

@media (max-width:980px){
  .nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;margin-inline:0;min-width:0;
    background:var(--ink-700);
    border-top:3px solid var(--orange-500);
    border-bottom:3px solid var(--ink-500);
    box-shadow:0 20px 0 rgba(0,0,0,.4);
    padding:5px 20px 26px;
    max-height:calc(100vh - var(--header-h-scrolled));
    overflow-y:auto;
  }
  .nav[data-open]{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{display:block;padding:15px 2px;font-size:1.05rem;border-bottom:var(--line-soft)}
  .nav__link::after{display:none}
  .nav__item:last-child .nav__link{border-bottom:0}
  .nav-toggle{display:inline-flex}
}
@media (max-width:560px){
  .brand__mark{font-size:1.05rem}
  .brand__sub{display:none}
  .nav-toggle__label{display:none}
  .nav__cta{padding:.45rem .75rem;font-size:.78rem}
}

/* ---------------------------------------------------------- breadcrumbs - */
.breadcrumbs{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--data-400);
  padding-block:16px;
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__list li{list-style:none}
.breadcrumbs__list li + li::before{content:"/";margin-right:8px;color:var(--steel-300)}
.breadcrumbs a{color:var(--data-400);text-decoration:none}
.breadcrumbs a:hover{color:var(--orange-500)}
.breadcrumbs [aria-current="page"]{color:var(--mist-100)}

/* ---------------------------------------------------------- chapters ---- */
.chapter{position:relative;padding-block:clamp(44px,7vw,104px)}
.chapter__head{display:grid;gap:12px;margin-bottom:clamp(22px,3vw,40px)}
.chapter__band{
  height:6px;width:var(--band-w,110px);
  background:var(--orange-500);
  transform-origin:left center;
  margin-bottom:6px;
}
.chapter__num{
  font-size:.85rem;letter-spacing:.2em;color:var(--orange-500);
}
.chapter__kicker{
  font-family:var(--font-serif);font-weight:600;font-size:1rem;
  color:var(--orange-300);letter-spacing:.02em;
}
.chapter__title{
  font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.08;
  font-size:clamp(1.6rem,4.2vw,3.1rem);color:var(--white);
}
.chapter__body{max-width:68ch;line-height:1.75}

/* ---------------------------------------------------------- surfaces ---- */
.panel{
  background:var(--ink-500);
  border:2px solid var(--ink-500);
  box-shadow:var(--shadow-hard-sm);
  padding:clamp(18px,2.4vw,28px);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.panel:hover{transform:translate(-4px,-4px);box-shadow:var(--shadow-hard)}
.panel--outline{background:transparent;border-color:var(--steel-300)}
.panel--accent{background:var(--ink-700);border-color:var(--orange-500)}
.panel--flat{box-shadow:none}
.panel--flat:hover{transform:none;box-shadow:none}

.aside-note{
  border-left:3px solid var(--orange-500);
  padding-left:14px;
  font-family:var(--font-mono);font-size:.78rem;line-height:1.7;
  color:var(--data-400);
}

/* ---------------------------------------------------------- data bits --- */
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{
  font-size:clamp(1.7rem,3.6vw,2.6rem);font-weight:700;line-height:1;
  color:var(--orange-500);
}
.stat__unit{font-size:.7rem;color:var(--data-400);margin-left:6px;letter-spacing:.1em}
.stat__label{
  font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--data-400);
}
.stat--up .stat__value{color:var(--neon-400)}

.status-dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--neon-400);
  animation:dot-pulse 2.4s ease-in-out infinite;
}
@keyframes dot-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(60,227,155,.55)}
  50%{box-shadow:0 0 0 7px rgba(60,227,155,0)}
}

.tag{
  display:inline-block;
  font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;
  padding:3px 9px;border:1px solid var(--steel-300);color:var(--mist-100);
}
.tag--accent{border-color:var(--orange-500);color:var(--orange-500)}
.tag--live{border-color:var(--neon-400);color:var(--neon-400)}

.datatable{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:.82rem}
.datatable th{
  text-align:left;text-transform:uppercase;letter-spacing:.14em;
  font-size:.66rem;font-weight:500;color:var(--data-400);
  background:var(--ink-500);padding:12px 14px;border-bottom:2px solid var(--steel-300);
  white-space:nowrap;
}
.datatable td{padding:12px 14px;border-bottom:var(--line-soft)}
.datatable tbody tr{transition:background-color .16s ease}
.datatable tbody tr:hover{background:var(--ink-700)}
.datatable td[data-side]{color:var(--orange-300)}

/* ---------------------------------------------------------- controls ---- */
.segmented{display:inline-flex;border:2px solid var(--steel-300);background:var(--ink-700)}
.segmented__btn{
  border:0;background:transparent;cursor:pointer;
  padding:.5rem 1rem;
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.06em;
  color:var(--mist-100);
  transition:background-color .18s ease,color .18s ease;
}
.segmented__btn + .segmented__btn{border-left:1px solid var(--steel-300)}
.segmented__btn:hover{color:var(--orange-500)}
.segmented__btn[aria-pressed="true"]{background:var(--orange-500);color:var(--ink-900);font-weight:700}

.disclosure{
  border-top:var(--line-soft);
}
.disclosure:last-child{border-bottom:var(--line-soft)}
.disclosure__trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;cursor:pointer;text-align:left;
  padding:18px 4px;
  font-family:var(--font-display);font-weight:700;font-size:1.02rem;color:var(--white);
  transition:color .18s ease;
}
.disclosure__trigger:hover{color:var(--orange-500)}
.disclosure__icon{
  flex:0 0 auto;color:var(--orange-500);font-family:var(--font-mono);
  transition:transform .26s ease;
}
.disclosure[data-expanded] .disclosure__icon{transform:rotate(90deg)}
.disclosure__panel{
  display:grid;grid-template-rows:0fr;
  visibility:hidden;
  transition:grid-template-rows .26s ease,visibility 0s linear .26s;
}
.disclosure[data-expanded] .disclosure__panel{
  grid-template-rows:1fr;visibility:visible;
  transition:grid-template-rows .26s ease,visibility 0s linear 0s;
}
.disclosure__inner{overflow:hidden;min-height:0}
.disclosure__body{padding:0 4px 22px;max-width:68ch;color:var(--mist-100);line-height:1.75}

/* ---------------------------------------------------------- media ------- */
.media{
  position:relative;display:block;overflow:hidden;
  background:var(--ink-500);
  border:2px solid var(--ink-500);
  box-shadow:var(--shadow-hard-sm);
}
.media__img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background-image:
    linear-gradient(rgba(215,225,240,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(215,225,240,.10) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
}
.media--scrim::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:rgba(5,11,26,.34);
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media__placeholder{
  position:absolute;inset:0;z-index:0;
  display:grid;place-items:center;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--data-400);background:var(--ink-500);
}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:14px 16px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
  color:var(--mist-100);
  background:rgba(5,11,26,.72);
  border-top:1px solid rgba(74,111,165,.5);
}

/* ---------------------------------------------------------- footer ------ */
.site-footer{
  margin-top:clamp(64px,9vw,140px);
  background:var(--ink-700);
  border-top:4px solid var(--ink-500);
  padding-block-start:clamp(40px,6vw,72px);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(24px,3vw,48px);
}
.footer__col--brand .brand{margin-bottom:16px}
.footer__pitch{max-width:30ch;font-size:.92rem;color:var(--mist-100);opacity:.88}
.footer__badge{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--neon-400);
}
.footer__title{
  position:relative;
  font-family:var(--font-mono);font-size:.68rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--data-400);
  padding-bottom:12px;margin-bottom:18px;
  border-bottom:2px solid var(--ink-500);
}
.footer__title::before{
  content:"";position:absolute;left:0;bottom:-2px;width:34px;height:2px;
  background:var(--orange-500);
}
.footer__list li + li{margin-top:11px}
.footer__list a{
  color:var(--mist-100);opacity:.86;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease,opacity .18s ease,border-color .18s ease;
}
.footer__list a:hover{color:var(--orange-500);opacity:1;border-bottom-color:var(--orange-500)}
.footer__contact li{display:flex;flex-direction:column;gap:2px}
.footer__contact li + li{margin-top:14px}
.footer__label{
  font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;color:var(--data-400);
}
.footer__value{font-size:.82rem;color:var(--mist-100);word-break:break-word}
.footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px 28px;
  align-items:center;justify-content:space-between;
  margin-top:clamp(32px,4vw,56px);
  padding-block:20px 28px;
  border-top:var(--line-soft);
}
.footer__note{font-family:var(--font-mono);font-size:.72rem;color:var(--data-400)}
.footer__copy{font-size:.78rem;color:var(--data-400)}

@media (max-width:1000px){
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}

/* ---------------------------------------------------------- motion ------ */
[data-reveal]{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}
[data-reveal] .chapter__band{transform:scaleX(0);transition:transform .6s cubic-bezier(.2,.7,.3,1) .08s}
[data-reveal].is-visible .chapter__band{transform:scaleX(1)}

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